6. It is the first time he has talked to Bob. => Bob hasn't talked to him before
->it/this+is+the first/second time+S+has/have+Ved/c3 = S+have/has+not+Ved/c3+before
7. We have not worn jeans before. => Jeans hasn't been worn before
->chủ ngữ câu này là tân ngữ câu trên->bị động
8. It is the first time I have supported him. => He hasn't been supported by me before
->kết hợp câu bị động và cấu trúc it/this+is+the first/second time+S+has/have+Ved/c3 = S+have/has+not+Ved/c3+before
9. This is the first time I have talked with him. => He hasn't been talked with by me before
->kết hợp câu bị động và cấu trúc it/this+is+the first/second time+S+has/have+Ved/c3 = S+have/has+not+Ved/c3+before
10. We have eaten maize since we ran out of money. Maize has been eaten since we ran out of money
->chủ ngữ câu này là tân ngữ câu trên->bị động
11. Gorge has visited Hai Phong since last Easter. Hai Phong has been visited by Gorge since last Easter
->chủ ngữ câu này là tân ngữ câu trên->bị động