Select the correct active form of the given sentence.
"The homework is being checked by the teacher."

Correct option is A

The correct active voice is “The teacher is checking the homework.”
Explain the rules of conversion (Passive → Active) with structure in detail:
· Identify Tense/Aspect: is being checked = Present Continuous Passive.
· Active structure needed: Subject + am/is/are + V1-ing + Object (Present Continuous Active).
· Swap roles: the homework (patient) ↔ the teacher (agent).
· Final form: The teacher (subject) + is + checking (V1-ing) + the homework (object).
Structure:
· Passive Voice: Object + am/is/are + being + V3 (+ by + Subject).
· Active Voice: Subject + am/is/are + V1-ing + Object.
Example:
· Passive: The documents are being verified by the officer. → Active: The officer is verifying the documents.
Why other options are incorrect:
· (b) was checking → Past Continuous, wrong tense.
· (c) checks → Simple Present (habitual), not ongoing.
· (d) has checked → Present Perfect, different aspect/meaning.