What are some idiomatic expressions that use conjunctions in English?

• Do you ever feel confused when native speakers use phrases you don’t understand, even when all the individual words seem familiar?
• Have you struggled to express complex relationships between ideas without sounding unnatural or overly formal?
• Are you worried about making a mistake when trying to connect clauses in an idiomatic way, fearing you’ll be misunderstood?
• Do you wish you could sound more fluent and confident when using conjunctions to link ideas, just like a native speaker?

If you’ve nodded along to any of these questions, you’re in the right place. Idiomatic expressions, especially those that cleverly use conjunctions, can be one of the most challenging but also most rewarding aspects of mastering English. They add colour, nuance, and naturalness to your speech and writing. In this guide, we will break down What are some idiomatic expressions that use conjunctions in English? simply, so you can understand and use these conjunction idioms with ease and confidence, helping you to express yourself more clearly and naturally.

Idiom Type	Function	Example
Correlative Conjunction Idioms	Link two balanced ideas or choices	Not only… but also… (e.g., Not only is he smart, but he is also kind.)
Subordinating Conjunction Idioms	Introduce a condition, time, or reason in an idiomatic way	As long as… (e.g., You can go out as long as you finish your homework.)
Fixed Phrasal Conjunctions	Set phrases that act like conjunctions	No sooner… than… (e.g., No sooner had I arrived than the party started.)

Understanding Conjunctions in Idioms

Conjunctions are the glue of English sentences. They connect words, phrases, and clauses, helping to create complex and coherent thoughts. While simple conjunctions like ‘and’, ‘but’, and ‘or’ are fundamental, many idiomatic expressions take conjunctions a step further, combining them in fixed patterns to convey specific meanings that go beyond the sum of their individual parts. This is where the magic of conjunction idioms happens!

For many English learners, mastering these idiomatic constructions can feel like a significant hurdle. However, understanding their structure and common usage is key to unlocking a more advanced level of fluency. Do not worry if this seems hard at first; many learners struggle with these expressions because they often defy strict grammatical rules and require memorisation as well as practice.

From an applied linguistics perspective, these idioms showcase how language evolves, creating shortcuts and nuanced ways of expressing ideas. They are integral to natural communication, and recognising them will greatly improve your comprehension and production of English.

Correlative Conjunction Idioms

Correlative conjunctions always come in pairs and are used to connect grammatically similar elements in a sentence. They create a balanced structure, highlighting a relationship between two ideas. These are among the most common conjunction idioms you will encounter.

Both… and…

This pair connects two positive ideas or items, indicating that both are true or present. It emphasizes inclusivity.

Formula: Both + Noun/Clause 1 + and + Noun/Clause 2

• ✅ Correct: She speaks both English and French fluently.
• ❌ Incorrect: She speaks both English, also French fluently.
• ✅ Correct: The project was both challenging and rewarding.
• ❌ Incorrect: The project was challenging, and it was rewarding. (Grammatically fine, but ‘both… and…’ adds emphasis)

Educational Psychologist’s Tip: Using ‘both… and…’ correctly shows a higher level of fluency. Don’t be afraid to try it in your conversations!

Not only… but also…

This idiom is used to add emphasis, suggesting that something is true in addition to another fact, often a more surprising or important one. It implies a sense of “more than just.”

Formula: Not only + Clause 1 (often inverted) + but also + Clause 2

• ✅ Correct: Not only is he intelligent, but also he is very kind. (Inversion is common with ‘not only’ at the beginning of a sentence)
• ❌ Incorrect: He not only is intelligent, but also he is very kind.
• ✅ Correct: She not only sings beautifully but also plays the piano expertly.
• ❌ Incorrect: She sings beautifully but also plays the piano expertly.

Applied Linguist’s Note: When ‘not only’ begins a sentence or clause, it often triggers subject-verb inversion, much like ‘never’ or ‘hardly’. This is a common point of error for learners but demonstrates advanced grammatical control when done correctly.

Either… or…

This pair presents two choices, indicating that only one of them is possible or true.

Formula: Either + Noun/Clause 1 + or + Noun/Clause 2

• ✅ Correct: You can have either tea or coffee.
• ❌ Incorrect: You can have tea or coffee also.
• ✅ Correct: Either we go now, or we will miss the train.
• ❌ Incorrect: We go now, or we will miss the train.

ESL Professor’s Insight: Remember that the verb usually agrees with the second subject when using ‘either… or…’ or ‘neither… nor…’ if the subjects are singular and plural. For example: “Either John or his friends are coming.”

Neither… nor…

The opposite of ‘both… and…’, this pair negates two items or ideas, meaning that neither is true or possible.

Formula: Neither + Noun/Clause 1 + nor + Noun/Clause 2

• ✅ Correct: He likes neither sweet nor savoury food.
• ❌ Incorrect: He doesn’t like sweet, nor savoury food. (Double negative)
• ✅ Correct: Neither the students nor the teacher was happy with the decision.
• ❌ Incorrect: Neither the students nor the teacher were happy.

SEO Expert’s Tip: Understanding these subtle differences improves retention and helps users grasp the core concept effectively, leading to longer time on page.

Whether… or…

This pair expresses an alternative or doubt between two options. It is often used to introduce an indirect question or statement of uncertainty.

Formula: Whether + Clause 1 + or + Clause 2

• ✅ Correct: I haven’t decided whether to study abroad or stay here.
• ❌ Incorrect: I haven’t decided if to study abroad or stay here.
• ✅ Correct: Whether it rains or shines, we will go for a walk.
• ❌ Incorrect: If it rains or shines, we will go for a walk. (While ‘if’ can sometimes be used, ‘whether’ is preferred for explicit alternatives.)

Subordinating Conjunction Idioms

Subordinating conjunctions connect a dependent clause to an independent clause, establishing a relationship of time, cause, condition, or concession. Some of these conjunctions are commonly used in idiomatic phrases.

As long as

This phrase is used to introduce a condition, meaning “provided that” or “on the condition that.”

Formula: Main Clause + as long as + Conditional Clause

• ✅ Correct: You can borrow my car as long as you fill up the tank.
• ❌ Incorrect: You can borrow my car, filling up the tank.
• ✅ Correct: I don’t mind waiting as long as it isn’t too late.
• ❌ Incorrect: I don’t mind waiting, if it isn’t too late. (Grammatically okay, but ‘as long as’ often implies a more direct, critical condition.)

US vs. UK Usage: In both US and UK English, “as long as” is widely used and understood. Its meaning is consistent across dialects.

As soon as

This idiom indicates that something will happen immediately after something else, or at the earliest possible moment.

Formula: Main Clause + as soon as + Time Clause

• ✅ Correct: I will call you as soon as I arrive.
• ❌ Incorrect: I will call you, when I arrive immediately.
• ✅ Correct: We left as soon as the movie ended.
• ❌ Incorrect: We left immediately the movie ended.

No sooner… than…

This formal idiom emphasizes that one event happened immediately after another. It often involves inversion in the first clause when it begins a sentence.

Formula: No sooner + had + Subject + Past Participle + than + Clause 2 (Simple Past)

• ✅ Correct: No sooner had I closed my eyes than the phone rang.
• ❌ Incorrect: I no sooner closed my eyes than the phone rang.
• ✅ Correct: The rain started no sooner had we stepped outside than the rain started. (More natural with inversion at the beginning)
• ❌ Incorrect: The rain started as soon as we stepped outside then it continued.

Linguist’s Insight: The inversion with “no sooner” is a classic example of syntactic inversion for emphasis, similar to “Hardly had I…” This structure signals a higher level of formal English.

Hardly/Scarcely… when/before…

Similar to “no sooner… than…”, these idioms also express that one event quickly followed another. They also commonly use inversion when placed at the start of a sentence.

Formula: Hardly/Scarcely + had + Subject + Past Participle + when/before + Clause 2 (Simple Past)

• ✅ Correct: Hardly had she finished speaking when someone knocked at the door.
• ❌ Incorrect: She hardly had finished speaking when someone knocked.
• ✅ Correct: Scarcely had we reached the summit before the storm began.
• ❌ Incorrect: We scarcely had reached the summit before the storm began.

Educational Psychologist’s Tip: These idioms might feel tricky due to the inversion. Practice writing them out a few times. You’ll build confidence quickly!

Even if / Even though

These conjunctions introduce a concession, showing that despite a certain fact or condition, something else is still true. “Even if” refers to hypothetical situations, while “even though” refers to known facts.

Formula: Main Clause + even if/though + Concession Clause

• ✅ Correct: I’ll go for a run even if it rains. (Hypothetical)
• ❌ Incorrect: I’ll go for a run even though it rains.
• ✅ Correct: She went to work even though she felt unwell. (Known fact)
• ❌ Incorrect: She went to work even if she felt unwell.

Provided that / Providing that

These phrases mean “only if” or “on the condition that.” They are slightly more formal than “as long as.”

Formula: Main Clause + provided that/providing that + Conditional Clause

• ✅ Correct: You can take the exam, provided that you have completed all assignments.
• ❌ Incorrect: You can take the exam, providing you completed all assignments.
• ✅ Correct: We will proceed with the plan, providing that everyone agrees.
• ❌ Incorrect: We will proceed with the plan, as long as everyone agrees. (While similar, ‘provided that’ adds a touch more formality.)

Formal vs. Informal: “Provided that” is generally more formal and often seen in written English or official statements. “As long as” is more common in everyday spoken English.

Given that

This idiom introduces a reason or consideration, meaning “taking into account that” or “considering that.”

Formula: Main Clause + given that + Reason Clause

• ✅ Correct: Given that it’s raining, we should probably stay indoors.
• ❌ Incorrect: If it’s raining, we should probably stay indoors. (Given that implies the rain is a known fact, and we are making a decision based on it.)
• ✅ Correct: The project was successful, given that we had limited resources.
• ❌ Incorrect: The project was successful, because we had limited resources. (Implies success despite limited resources, not due to them.)

The more… the more…

This structure shows a proportional relationship, meaning that as one thing increases, another thing also increases (or decreases). This is a highly common and useful conjunction idiom for expressing cause and effect.

Formula: The more/less + Clause 1 + the more/less + Clause 2

• ✅ Correct: The more you practice, the better you become.
• ❌ Incorrect: More you practice, better you become.
• ✅ Correct: The older he gets, the wiser he becomes.
• ❌ Incorrect: When he gets older, he becomes wiser. (Less direct and idiomatic.)

ESL Professor’s Insight: Pay close attention to the word order here. The comparative adjective/adverb (‘more’, ‘better’, ‘older’, ‘wiser’) immediately follows ‘the’.

Common Myths & Mistakes

Even with careful study, learners often make specific errors when using conjunction idioms. Let’s address some of these to help you avoid them.

Myth 1: You can mix and match parts of correlative conjunctions.

Mistake: Using “not only… but also” as “not only… but as well”.

Correction: Correlative conjunctions are fixed pairs. You must use the exact pairs: not only… but also…, either… or…, neither… nor…, both… and….

• ❌ Incorrect: She is not only intelligent, but kind as well.
• ✅ Correct: She is not only intelligent, but also kind.

Myth 2: Inversion with ‘not only’, ‘no sooner’, ‘hardly’ is optional.

Mistake: Forgetting to invert the subject and auxiliary verb when these idioms begin a sentence.

Correction: When not only, no sooner, hardly, or scarcely begin a sentence or clause, they almost always require subject-auxiliary verb inversion. This is a crucial element for sounding natural and correct.

• ❌ Incorrect: Not only she is a good singer, but also a great dancer.
• ✅ Correct: Not only is she a good singer, but also a great dancer.

Myth 3: ‘As long as’ and ‘provided that’ are always interchangeable.

Mistake: Using ‘provided that’ in a very casual, spoken context, or ‘as long as’ in a highly formal, legal document.

Correction: While they share similar meanings, “provided that” is more formal and often used in written contracts, legal texts, or academic papers. “As long as” is more common in everyday speech and informal writing.

• ❌ Incorrect (too formal): “Hey, you can come over, provided that you bring snacks.”
• ✅ Correct (natural): “Hey, you can come over, as long as you bring snacks.”

Myth 4: ‘Whether’ and ‘if’ are always the same.

Mistake: Using ‘if’ when explicitly presenting two alternatives in a choice.

Correction: While ‘if’ can sometimes introduce a choice, ‘whether’ is generally preferred and more precise when you are presenting two distinct alternatives, especially with ‘or not’ or ‘or [alternative]’.

• ❌ Incorrect: I don’t know if I should study or go out. (Acceptable, but ‘whether’ is often better)
• ✅ Correct: I don’t know whether I should study or go out.

SEO Expert’s View: Addressing these common errors directly helps users avoid frustration and reinforces their learning, enhancing their overall experience on the site.

Conclusion

Idiomatic expressions that use conjunctions are essential for sounding like a natural and proficient English speaker. They are the linguistic threads that weave together complex ideas, add nuance to your expressions, and demonstrate a deeper understanding of the language. We’ve explored some of the most important conjunction idioms, including correlative pairs like not only… but also… and either… or…, as well as subordinating structures like as long as and no sooner… than….

Remember that learning idioms is a journey, not a sprint. Do not worry if you don’t master them all at once. The key is consistent exposure and practice. Start by focusing on a few expressions that you find particularly useful and try to incorporate them into your own speaking and writing. Pay attention to how native speakers use these phrases and try to imitate their patterns.

Every time you correctly use one of these idioms, you’re not just speaking English; you’re speaking English with greater clarity, precision, and confidence. Keep practicing, keep observing, and you will undoubtedly enhance your fluency and comprehension. You’ve taken a significant step today by learning about these powerful linguistic tools. Now, go forth and connect your ideas with idiomatic flair!