He does?
He ran?
I think I read a complete interrogative requests a subject, and verb. So, may I use these two sentences, and have them grammatically all right?
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He ran?
I think I read a complete interrogative requests a subject, and verb. So, may I use these two sentences, and have them grammatically all right?
These aren't complete sentences. But they would be understood and accepted as responses to a statement indicating that you find it unlikely or surprising.
Alice: Bob likes Mexican food.
Carl: He does?
Carl is saying that he is surprised that Bob likes Mexican food, or that he doesn't think that this statement is true.
But it's not a complete sentence. A complete sentence would be something like:
Does Bob like Mexican food?