Can you write an interrogative sentence like The bicycle was invented by whom If your answer is yes please explain the grammar?

Answer 1

Certainly. "The bicycle was invented by whom?" is a question, and hence interrogative.

This question is worded in the passive voice. In the active voice, it would be written thus: "Who invented the bicycle?" When you switch from the active to the passive, the object of the verb (bicycle, object of invented) becomes the subject, and the agent or doer of the verb (the subject--in this case who) becomes the object of the proposition by.

There are several ways to word the question in the passive. Maybe you'll think this sounds more like a question: "By whom was the bicycle invented?" That is exactly the same question, same mood (indicative), same voice (passive), same sentence type (interrogative), same subject (bicycle), and same verb (was invented) as in the original question you posed. The change of word order is a perfectly legal shift.

Oh, and we know it's an interrogative sentence (a question) because it has an interrogative pronoun and a question mark. Inversion of the subject and verb is in a question is expected for some question types ("Where were you on the night of the fifteenth?") but not mandatory for all.