1. She said to me that she had seen me in the library the day before

Câu bị động lùi 1 thì, yesterday => the day before

2. Nam said he didn't know what his mother was doing then

Câu bị động lùi 1 thì, now => then

3. The boy asked his sister if she could tell him what had happened the night before

Câu bị động dạng yes/no question: asked sb if + mệnh đề lùi 1 thì và để dạng khẳng định, last night => the night before

4. My brother asked me why I wasn't curious about what an alien looked like

Câu bị động với wh-question: asked sb + wh-question + mệnh đề để dạng khẳng định lùi 1 thì

1. she told me that she had seen me in the library the day before                                 2. Nam said that he didn't know what his mother was doing then                                 3. the boy asked his sister if she could tell him what had happened the perious night                                                                                                                                  4. my brother asked me why i wasn't curious about what an alien looks like                   câu 3 mình ko biêt lm thế có đúng không bạn xem lại câu 3 hộ mình nha