# 1ปรนัยWhat is the structure of the present simple in passive form?S + is/am/are + V3 + (by + O).S + V1 + O.S + was/were + V3 + (by + O).
# 2ปรนัยWhat is the structure of the past simple in passive form?S + V2 + O.S + is/am/are + V3 + (by + O).S + was/were + V3 + (by + O).
# 4ปรนัยWhat is the correct passive form of this sentence? “The teacher explains the lesson.”The lesson is explained by the teacher.The lesson was explained by the teacher.The teacher is explaining the lesson.