FANBOYS Comma Rule: What 11+ Parents Need to Know

FANBOYS, Comma or Not?

In my free weekly comprehension, SPaG and vocabulary sessions, children often tell me they have been taught not to use a comma before a FANBOYS conjunction, and that they have even been told it is ‘wrong’. That is why I am writing this blog.

Parents often search for ‘FANBOYS’ because it can be presented as an ‘11+ rule’. The problem is that school teaching, 11+ expectations and what grammar checkers flag do not always align.

If your child feels confused, it is not because they are ‘bad at grammar’. It is because they are being taught two different versions of what counts as ‘correct’.

What is FANBOYS?

FANBOYS is a memory aid for the coordinating conjunctions: for, and, nor, but, or, yet, so.

Children are taught that these conjunctions can join ideas. That part is fine.

Within KS2 teaching, the examples children often meet tend to use the most familiar coordinating conjunctions – and, but, or, so. In 11+ style practice and in higher-level reading passages, children may also meet ‘for’, ‘nor’ and ‘yet’ more often, so it helps to recognise the full set confidently.

Why KS2 teaching does not always match 11+ expectations

In England, KS2 teaching is driven by the National Curriculum from the Department for Education (DfE). The punctuation appendix sets out the comma uses children should learn, such as commas for clarity and to mark extra information.

It does not give a specific ‘comma before FANBOYS’ rule for joining two independent clauses. (Department for Education, National Curriculum in England, English Appendix 2: Vocabulary, grammar and punctuation)

So, if a primary teacher does not insist on that comma as a fixed rule, they are not automatically ‘teaching it wrong’. The National Curriculum does not present this as a simple exam-style rule in the way many grammar checkers and editors do.

Oak National Academy, which has been described in government documentation as an arm’s length body linked to the Department for Education, is a useful example. In a number of KS2 grammar lessons, Oak teaches the comma rule in compound sentences using ‘but’ and ‘or’, rather than presenting it as a blanket rule across all coordinating conjunctions. This is not a criticism of Oak. It shows that even well-resourced, curriculum-aligned materials do not always present this point as a fixed, exam-style rule in the way grammar checkers and editors often do. (Oak National Academy, ‘Using the comma rule in compound sentences’) (Oak National Academy, ‘Comma rules in three sentence types’)

The real problem for parents

The 11+ is often described as ‘KS2 aligned’, but parents are rarely given detailed, public marking guidance in the way they are with SATs.

On top of that, questions are often asked in creative ways. The skill being tested might be KS2, but the format can feel unfamiliar. Some independent schools also set their own tests, choosing what to assess and how to assess it.

So parents are left trying to guess which ‘rules’ matter most on the day.

A quick note for parents whose child has been taught ‘never use the comma’

Some children are explicitly taught that no comma is required before a FANBOYS conjunction, and that using one is ‘wrong’. That is a dangerous oversimplification, because children often hear it as ‘The comma is wrong’ or ‘Never use it’.

A comma before the conjunction is a widespread convention when two independent clauses are being joined, and it is the version that grammar checkers and editors expect. (Grammarly, ‘Comma Before And’) (ProWritingAid, ‘Comma Before Conjunction’)

So, if your child has been taught ‘never’, unteach the ‘never’. The accurate message is that a teacher might not require it in KS2, but your child will see it elsewhere, and it is often the safer option in 11+ preparation.

The ‘so’ complication

‘So’ can be tricky because children can meet it in more than one structure.

Sometimes ‘so’ means ‘therefore’ and links two independent clauses. In that structure, many style guides and grammar checkers expect a comma before ‘so’. (Grammarly, ‘Comma Before And’) (ProWritingAid, ‘Comma Before Conjunction’)

Sometimes children are taught ‘so that’ as a subordinating structure. The problem is that children can wrongly generalise that and assume ‘so’ never needs a comma.

For 11+ preparation, a clear approach might be best. If ‘so’ is linking two complete sentences, treat it like the FANBOYS ‘so’ and use the comma.

Why grammar checkers and professional editors flag it

Grammar checkers do not follow the KS2 curriculum. They follow mainstream style conventions used in adult writing and editing.

Two of the most widely used checkers are Grammarly and ProWritingAid. Both describe the same core convention.

If a coordinating conjunction joins two independent clauses, you use a comma before the conjunction. (Grammarly, ‘Comma Before And’) (ProWritingAid, ‘Comma Before Conjunction’)

That is also the convention used by many editors. My editor would never allow the ‘no comma’ style in my published writing.

This is why a child can write something their teacher accepts, paste it into a checker and then see it flagged as wrong.

That is not a child problem. It is a system problem.

Why this matters in 11+ preparation

Punctuation is commonly treated as a mark-bearing skill in 11+ preparation. Even when a paper is not testing punctuation in isolation, families are usually preparing for a setting where accuracy and control matter.

Bond’s published 11+ materials include a writing mark scheme that awards marks for ‘correct grammar and punctuation’ and lists correct use of commas as an example. That is not proof of how every 11+ paper is marked, but it shows why punctuation, including commas, becomes a pressure point in practice. (Bond 11+, English Standard Assessment Papers, answers and mark scheme PDF)

I also want to be honest about my own experience here. Over the last ten years, I have seen many third-party 11+ publishers treat this comma as a right-or-wrong point in practice questions, and I have seen the missing comma marked as wrong.

That does not prove how every school marks every 11+ paper. It does show why parents feel the pressure. If punctuation is treated as mark-bearing in published practice materials, families will naturally teach to that.

Where BBC Bitesize adds to the confusion

BBC Bitesize is widely recommended, including by me, because a lot of it is clear and child-friendly. However, its KS2 teaching on coordinating conjunctions does not always make the comma convention explicit when two independent clauses are joined. Some children then assume the comma is never needed, which clashes with what grammar checkers flag and with much 11+ practice material.

Where AI writing tools add to the confusion

It is also worth knowing that some general AI writing tools and large language models, which many children and parents now use for drafting and checking, are not always consistent on this point either. Many will omit the comma before a coordinating conjunction even in sentences where two independent clauses are being joined. If your child uses an AI tool to help with writing and notices the comma is missing, that does not mean the comma is wrong. It may simply mean the tool has not applied the convention consistently. As with grammar checkers, it is worth knowing the rule yourself rather than assuming the technology always models it correctly.

One more complication – old-fashioned punctuation in comprehension passages

Another thing parents might not expect is that 11+ comprehension passages can be taken from classic texts or older writing. That means children sometimes meet punctuation styles that look ‘odd’ by modern classroom standards.

So, children should recognise that punctuation style can vary in reading passages. That does not mean they should copy old punctuation styles in their own writing. It means they should not panic when they see them.

My concern and why this is a minefield

My concern is exactly what parents worry about.

If KS2 does not explicitly teach the comma-before-FANBOYS convention as a hard rule, could a child ever be marked down for using the comma?

In normal writing, no. A comma before a coordinating conjunction is an accepted convention, and it is often recommended for clarity. (Grammarly, ‘Comma Before And’) (ProWritingAid, ‘Comma Before Conjunction’)

The bigger risk in 11+ preparation is usually the opposite. Children omit it, then meet practice materials and checkers that treat it as an error.

Because marking standards are rarely transparent, this becomes a risk-management decision for parents.

What I advise is the safe bet for 11+

I am not an exam marker, nor a paper provider, so I cannot claim to know how every 11+ paper handles every missing comma.

What I can do is point you towards the safest convention for a high-stakes setting, based on what children are likely to meet in practice materials and what mainstream grammar checkers will flag.

So, when you are preparing for the 11+, I advise this as the safer bet.

Use a comma before a FANBOYS conjunction when it joins two independent clauses. (Grammarly, ‘Comma Before And’) (ProWritingAid, ‘Comma Before Conjunction’)

A quick way to teach it at home

Remove the conjunction and add a full stop.

If you now have two complete sentences, you need the comma before the conjunction when you put it back.

Example

I wanted to go. I had no time.

I wanted to go, but I had no time.

A quick warning. Do not confuse this with a comma splice. A comma splice is when a comma is used to join two complete sentences with no conjunction, and that is genuinely incorrect.

Here is the same example set, but showing a comma splice:

I wanted to go. I had no time.

Comma splice (wrong):
I wanted to go, I had no time.

Correct fixes:
I wanted to go, but I had no time.
I wanted to go. I had no time.

The takeaway for parents

A KS2 teacher might not mark a missing comma here as wrong, especially if the sentence is clear. A grammar checker often will. Many 11+ practice materials assume the comma.

So, you have a choice.

You can follow the minimum explicitly required at KS2, or you can teach the safer convention that reduces confusion at home and risk in 11+ preparation.

I recommend the safer convention.

For more writing help, email info@slager.co.uk