Question

Does a comma go before 'but'?

Answer 1

It depends solely on the sentence.

Here are a few more examples of when you should and shouldn’t use a comma before but in a sentence:

Incorrect: The dog is young, but well trained.

Correct: The dog is young but well trained.

Incorrect: Grammar is boring, but necessary.

Correct: Grammar is boring but necessary.

Incorrect: The dog is young but he’s well trained.

Correct: The dog is young, but he’s well trained.

Incorrect: Grammar is boring but it’s necessary.

Correct: Grammar is boring, but it’s necessary.

Answer 2

depends on the sentence