Chuyển sang câu bị động 1. I didn't see them two months ago 2 Mary hasn't cleaned the floor yet 3. We are visiting a factory at present
2 câu trả lời
1.I didn't see them two months ago
->They weren't seen for two months ago.
2 .Mary hasn't cleaned the floor yet
->The floor hasn't been cleaned by Mary yet.
3 .We are visiting a factory at present
->A factory is being visited at present.
1 . They weren't seen for two months ago
2 . The floor hasn't been cleaned by Mary yet.
3 . The/A factory is being visited at present.