1. Họ đã đi đến trường hôm qua.
→they went to school yesterday
\(\left(-\right)\)they didn't go to school yesterday
\(\left(?\right)\)did they go to school yesterday?
2. Mẹ của họ đã bị bệnh 2 ngày trc đây.
→their mom had a faver two days ago
\(\left(-\right)\)their mom didn't have a fever two days ago
\(\left(?\right)\)did their mom have a fever two days ago?
3. Lan đã gửi lá thư đó vào thứ 6 tuần trc.
→lan sent that letter six weeks ago
\(\left(-\right)\)lan didn't send that letter six weeks ago
\(\left(?\right)\)did lan send that letter six weeks ago?
4. Cô ấy đã rất buồn hôm qua.
→she was very sad yesterday
\(\left(-\right)\)she wasn't very sad yesterday
\(\left(?\right)\)was she very sad yesterday
5. Họ đã làm cái bánh này tuần trc.
→they made this cake last week
\(\left(-\right)\)they didn't make this cake last week
\(\left(?\right)\)did they make this cake last week?
6. Nam đã ở nhà cả ngày hôm qua.
→nam was at home all day yesterday
\(\left(-\right)\)nam wasn't at home all day yesterday
\(\left(?\right)\)was nam at home all day yesterday?
7. Tôi đã thức dậy sớm hôm qua.
→i got up early yesterday
\(\left(-\right)\)i didn't get up early yesterday
\(\left(?\right)\)did you get up early yesterday?
