English Reference

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Coordinating conjunctions

Coordinating conjunctions connect words, phrases, or independent clauses of equal grammatical importance. The most common forms at A1 level are and, but, or, and so.

A1Beginner

01 / Overview

Coordinating conjunctions function as links between elements that have the same status in a sentence. They can join two nouns, two verbs, or two complete sentences to show a specific relationship between them.

  • And adds information.
  • But shows a contrast or a different idea.
  • Or presents a choice or alternative.
  • So shows a result or consequence.

02 / Sentence Structure

Clause 1 + , + conjunction + Clause 2

When joining two independent clauses (complete sentences), a comma is typically placed before the conjunction. When joining two words or short phrases, no comma is required.

03 / Examples

04 / Common mistakes

  • I am hungry, because I eat a sandwich.

    I am hungry, so I eat a sandwich.

    Use 'so' for the result. 'Because' is used for the reason, which would reverse the sentence order.

  • She speaks English but Spanish.

    She speaks English and Spanish.

    Use 'and' to add similar items. 'But' is only for contrasting or opposite ideas.

05 / Choosing the Right Conjunction

ConjunctionFunctionExample
andAdditionI have a cat and a dog.
butContrastIt is small but clean.
orOptionIs it Tuesday or Wednesday?
soResultI am sick, so I stay home.

06 / Practice

  1. I want to go to the park, ___ it is raining.

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    Answer: but

    Why: The second clause contrasts with the first; rain is an obstacle to going to the park.

  2. Would you like tea ___ coffee?

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    Answer: or

    Why: The sentence offers a choice between two different drinks.

  3. He studied hard, ___ he passed the exam.

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    Answer: so

    Why: Passing the exam is the direct result of studying hard.