Do you put a semicolon or a comma before however?

It depends on how many sentences are left when you lift however out. Two complete sentences: a semicolon in front of however and a comma after it. One sentence, with however in the middle: a comma on each side. A comma alone before however, with two sentences, is a comma splice.

Why is a comma before however a comma splice?

However is not a joining word. It comments on a sentence and can move to the middle or the end of that sentence, so it holds nothing together. Two complete sentences still need a full stop or a semicolon between them, and the comma only sets however off after it.

Is therefore punctuated the same way as however?

Yes. Therefore, instead, nevertheless, moreover and consequently work the same way. The meaning differs, because however shows contrast and therefore shows a result, but the test for punctuation is identical: lift the word out and count the sentences.

Does but take a comma after it, as however does?

No. But is a joining word. It does not move, so the comma goes in front of it and never behind. Try putting but at the end of its sentence: it will not go, and a word that cannot move is not a mover.

Can I use a full stop instead of a semicolon before however?

Yes, when two complete sentences meet. A full stop in front of however, with a capital letter and a comma after, is as correct as a semicolon. Because the two do the same job, a question that offered both would have no single right answer.

However and therefore: where the semicolon goes

However, therefore and instead join nothing, and they can move about inside their own sentence. Lift the word out and count the sentences left. Two: a strong mark on the far side of the word from its sentence, then a comma. One: a comma on each side.

1.Spot a word that comments on a sentence, such as however, therefore, instead or nevertheless. It joins nothing, and it can move to the middle or the end of its own sentence.
2.Lift the word out and count the sentences that are left: two complete sentences, or one.
3.Two sentences: the word belongs to the second, so the semicolon (or a full stop) goes in front of it and a comma follows it. A comma in front of it is a comma splice.
4.One sentence: the word is an insertion in the middle of it, so it takes a comma on each side. A semicolon here cuts the sentence in half.
5.If the word will not move, it is a joining word such as but. The comma goes in front of it and never behind.

Try it on a question

Work it below before you open the working. The steps say what to do, and you can do each one yourself.

A weaver bought a bale of wool from a hill farm in the uplands, for less than half the usual price. She expected the wool to be ______ it spun into a thread soft enough for scarves. She sold the first dozen scarves at the autumn market, and every one went by noon.

Which choice completes the text so that it conforms to the conventions of Standard English?

Choice A: coarse, however,
Choice B: coarse; however,
Choice C: coarse however
Choice D: coarse; however

1
Name each side of the slot. Cover the word of comment and ask of the words on the left, then of the words on the right: could they stand alone as a sentence?
2
Try the four choices on each sentence and read the verdict. Notice where the strong mark sits in relation to the word, and where the comma sits.
3
Watch for two sentences that are different from the rest. In one, lifting the word out leaves a single sentence. In another, the word will not move at all.

Words that move

Sentence 1 of 5

However, therefore and instead join nothing. Lift the word out, count the sentences that are left, and put the strong mark on the far side of the word from its owner.

The first survey of the cliff found no the slot the second survey found eleven.

1. Cover one side, then the other. Can each stand alone as a sentence?

Left of the slot

“The first survey of the cliff found no …”

Right of the slot

“the second survey found eleven.”

2. Which choice belongs in the slot?

Answer for both sides first.

The full working, and why each wrong choice is there

Cover the blank and name each side. "She expected the wool to be coarse" is a complete sentence, and so is "it spun into a thread soft enough for scarves". Lift however out and two sentences are left, so a strong mark is needed. However comments on the second sentence, so the semicolon goes in front of it and a comma goes after it.

Choice A: coarse, however,
Commas on both sides are how a word like however is treated in the middle of a sentence. Here, though, a complete sentence stands on each side of the blank, and a comma cannot hold two sentences together.
Choice B: coarse; however,the answer
A complete sentence stands on each side. However comments on the second one, so the semicolon goes in front of it and a comma follows it.
Choice C: coarse however
This runs two complete sentences into each other with only however between them. However joins nothing, so nothing holds them together.
Choice D: coarse; however
The semicolon sits in the right place, but however is left running into the rest of its sentence, with nothing to set it off.

Use it when

A choice has however, therefore, instead, nevertheless or a word like them at the blank, and the choices differ in a semicolon, a comma or a full stop around it.
Two groups of words that could each be a sentence meet at the blank, with a word of comment between them.
The word seems to sit inside a single sentence, and the choices put commas, or a semicolon, around it.

Do not use it when

The choices differ in a verb, a pronoun or a different word, not in a mark. This move settles punctuation and nothing else.
The word at the blank is but, and, so or yet. A joining word does not move, so the lift-and-count test does not apply: the comma goes in front of it and never behind.
The word is although, because or while. It makes what follows depend on the first half, so there is one sentence and no strong mark belongs there.
The question asks which transition fits the meaning, however or therefore. That is a question about direction, not about punctuation.

Five questions on this move

Untimed, and nothing is saved. A wrong first answer gets one more try before the working is shown.

Question 1 of 5

The otters that live in the bay feed mostly on crab and small fish, and they rarely travel far from the shore. Crab were scarce in the two colder ______ the otters moved to the mouth of the next river. By spring the bay was quiet, and the fishing boats saw none of them.

Which choice completes the text so that it conforms to the conventions of Standard English?

Five is a start

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How this page was checked

Every punctuation answer, by our rule table
For each of the 6 questions on this page, what stands on each side of the blank is recorded, and an automated test checks that our table of punctuation rules calls the keyed choice legal and the other three not.
The whole page, by a person
Not yet. Every question and every item of its lab was worked through in a browser by Claude, an AI assistant, on 14 October 2026. The page was published on 14 October 2026 before a person had read it. If something here is wrong, tell us and it is put right.

The questions were drafted with AI and are original: none is a College Board question, and none comes from the question bank behind our practice tests.

Where this comes from

“Lift the mover out” is one card from the Preptics lesson Boundaries: place the strong mark beside a movable word, which sits under the Digital SAT skill Boundaries. The lesson has the other cards around it, and its questions come back for review on a schedule. The lessons are part of the Digital SAT track.

Common questions

Do you put a semicolon or a comma before however?: It depends on how many sentences are left when you lift however out. Two complete sentences: a semicolon in front of however and a comma after it. One sentence, with however in the middle: a comma on each side. A comma alone before however, with two sentences, is a comma splice.
Why is a comma before however a comma splice?: However is not a joining word. It comments on a sentence and can move to the middle or the end of that sentence, so it holds nothing together. Two complete sentences still need a full stop or a semicolon between them, and the comma only sets however off after it.
Is therefore punctuated the same way as however?: Yes. Therefore, instead, nevertheless, moreover and consequently work the same way. The meaning differs, because however shows contrast and therefore shows a result, but the test for punctuation is identical: lift the word out and count the sentences.
Does but take a comma after it, as however does?: No. But is a joining word. It does not move, so the comma goes in front of it and never behind. Try putting but at the end of its sentence: it will not go, and a word that cannot move is not a mover.
Can I use a full stop instead of a semicolon before however?: Yes, when two complete sentences meet. A full stop in front of however, with a capital letter and a comma after, is as correct as a semicolon. Because the two do the same job, a question that offered both would have no single right answer.

Keep going

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