When did your friend came correct the sentence?

The sentence "Did your friend come correct the sentence?" is grammatically incorrect.

Here are a couple of ways to correct it:

* "When did your friend come to correct the sentence?" This is the most natural way to phrase the question.

* "When did your friend come and correct the sentence?" This is another acceptable way to phrase the question.

It's important to use the correct grammatical structure and word order to make your sentence clear and understandable.