7. Passive voice: S + be + P.P.( + by + O)
Simple present tense : S + is /am are + p.p + by + O
Simple past tense : S +was /were + p.p + by + O
Present perfect tense : S + have / has + been + p.p + by + O
Present progressive tense: S + am/ is/ are + being + pp + by + O
Past progressive tense: S + was/ were + being + pp + by + O
Modal verbs: Will / shall /can / could /must/ should /may / might / have to / used to / be going to
S + Modal verb +be +p.p + by + O
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