Coordinating conjunctions are the simplest and most frequently used conjunctions in English. They join two words, phrases, or complete clauses that are grammatically equal — two nouns, two verbs, or two full sentences. The seven coordinating conjunctions are often remembered with the acronym FANBOYS: For, And, Nor, But, Or, Yet, So. While students use 'and' and 'but' from very early on, they rarely know the full set, and they frequently make errors with punctuation and with the meaning differences between similar conjunctions. This lesson gives teachers a clear, practical framework for the whole group.
Before you start — think honestly about your own teaching and experience.
Look at the examples. Answer each question before reading the explanation — this is how your students will learn too.
All four sentences share the same first clause. What does each conjunction signal about the relationship between the two clauses? Which pairs are similar in meaning? What is the difference between 'but' and 'yet'?
'And' adds information without indicating a relationship. 'But' signals contrast or an unexpected result. 'So' signals a result or consequence. 'Yet' also signals contrast, but carries a stronger sense of surprise — the result is more unexpected than 'but' suggests. Students often use 'but' and 'yet' interchangeably, but 'yet' is slightly more formal and implies greater surprise. The relationship between the two clauses is entirely controlled by which conjunction is chosen — this is why the choice matters.
Are both sentences correct? What is the difference? When does a comma appear before a coordinating conjunction, and when is it optional or absent?
When a coordinating conjunction joins two independent clauses (each with its own subject and verb), a comma before the conjunction is standard in formal written English. When the conjunction joins two words or phrases (not full clauses), no comma is used: 'She is tired but determined' (no comma — 'determined' is not a full clause). Many students either always use a comma or never use one — understanding the full clause vs. phrase distinction resolves both errors.
What is unusual about the word order in these sentences? After 'nor', the subject and verb are inverted. Why? What kind of idea does 'nor' add? What would happen if you used 'and' instead?
'Nor' adds a second negative idea to a sentence that already contains a negative. It requires subject-verb inversion after it ('nor did she' not 'nor she did'). Using 'and not' instead of 'nor' is possible in informal speech ('She didn't shout and she didn't cry') but 'nor' is more formal and more economical. Students rarely use 'nor' and when they do, they often forget the inversion. 'For' is the other rare coordinating conjunction — it means 'because' in a formal or literary register and is rarely used in everyday speech.
| Tense / Form | Use / Meaning | Example | Key time words |
|---|---|---|---|
| Conjunction | Relationship | Example | Note |
| and | Addition | She marked the books and wrote the report. | Most overused — teach alternatives |
| but | Contrast | He studied hard, but he did not pass. | Comma needed before 'but' between two clauses |
| or | Alternative / choice | Finish now or wait until tomorrow. | Also used in questions and negatives |
| so | Result / consequence | It was raining, so the match was cancelled. | 'So' ≠ 'so that' — see adverbs series Lesson 7 |
| yet | Contrast (surprise) | She was exhausted, yet she kept working. | More formal and surprising than 'but' |
| for | Cause / reason (formal) | He left early, for he had a long journey. | Literary/formal — rarely used in speech |
| nor | Negative addition | She did not shout, nor did she cry. | Requires subject-verb inversion after it |
Starting a sentence with 'And' or 'But' is a long-standing point of confusion for teachers. Traditional grammar instruction often prohibited it, but professional writers and educated speakers use sentence-initial 'And' and 'But' regularly for rhetorical effect — to create a pause, add emphasis, or signal a sharp contrast. The prohibition comes from school writing instruction, not from the grammar of English itself. At B1 level, the safest advice is: in formal writing, avoid starting sentences with coordinating conjunctions; in speech and informal writing, it is widely accepted. What students should never do is use a sentence-initial 'And' or 'But' as a substitute for proper clause joining — 'She was late. And she forgot her book.' should usually be 'She was late, and she forgot her book.' The real teaching goal is joining clauses correctly, not a blanket ban on sentence-initial conjunctions.
Quick checks: • Does the conjunction join two full clauses (each with subject + verb)? → Use a comma before it • Does the conjunction join only two words or phrases? → No comma needed • Is the contrast surprising or unexpected? → Consider 'yet' instead of 'but' • Does the sentence express a result? → Use 'so' (not 'so that', which expresses purpose) • Does the sentence add a second negative? → Use 'nor' with inverted word order
Choose the correct coordinating conjunction for each sentence. Think carefully about the relationship between the two clauses.
Each sentence contains one error with a coordinating conjunction. Find and correct it.
Use this sequence directly in class — guided discovery, no textbook needed. Tap each step to mark it done.
STEP 1 — FANBOYS on the board (5 min): Write the seven conjunctions on the board: For, And, Nor, But, Or, Yet, So. Tell students the acronym FANBOYS. Ask: which of these do you use most often? Which have you never used? Ask a student to use each one in a spoken sentence about school life. Write the best example for each on the board.
STEP 2 — What relationship? (5 min): Write four versions of the same sentence starter on the board ('The students studied hard...') completed with 'and', 'but', 'so', 'yet'. Ask: what does each sentence tell us? Which implies the most surprise? Which signals a result? Build up a simple meaning map on the board: addition / contrast / result / surprise.
STEP 3 — Comma or no comma? (5 min): Write four sentences — two where the conjunction joins full clauses (comma needed) and two where it joins words or phrases (no comma). Students decide which need a comma. Introduce the rule: two full clauses = comma; words or phrases = no comma. Ask students to test each sentence: does each side have its own subject and verb?
STEP 4 — Fix the run-on (5 min): Write a long 'and...and...and' run-on sentence on the board. Ask students in pairs to rewrite it using a variety of conjunctions. Share results and compare — which version sounds most natural? This reinforces that overusing 'and' is a real writing problem, not just a grammar error.
STEP 5 — Consolidate: three true sentences (5 min): Ask each student to write three true sentences about their school using three different coordinating conjunctions from FANBOYS — none of them 'and'. Students share one sentence each. The class checks: correct conjunction choice? Comma if joining two full clauses?
Use directly in class — copy, adapt, or read aloud. No printing needed.
For each strategy, choose the option that best describes where you are now.
Your feedback helps other teachers and helps us improve TeachAnyClass.