Have you and he been building a small engine?
Can someone please analyze the sentence above please.

It is grammatically correct.

Explanation:

However, nobody talks like this. Unless you are writing a story that took place 100 years ago, I would try this:

Have you both been building a small engine?

an interrogative sentence is a type of sentence that asks a question, as opposed to sentences that make a statement, deliver a command, or express an exclamation. interrogative sentences are typically marked by inversion of the subject and predicate; that is, the first verb in a verb phrase appears before the hope i