chia động từ mệnh lệnh khẳng đinh và phủ định
1. ..upstairs. (go)
2. ..in this lake. (not/ swim)
3. ..your homework. (do)
4. ..football in the yard. (not/ play)
5. ..your teeth. ( brush)
6. ..during the lesson. (not/talk)
7. ..the animals in the zoo. (not/ feed)
8. ..the instructions. (read)
9. ..late for school. (not/ be)
10. ..your mobiles. (switch off)
11. ..our brother. (ask)