1. Be quiet! The baby (sleep) is sleeping.

⇒Chỉ hành động em bé đang ngủ

⇒Câu mệnh lệnh

2. My parents want to see you. They (not/ see) haven't seen you for a long time.

⇒có cụm "for a long time" nên dùng present perfect.

3. They used cans and bottles (collect) to collect to do mini-projects every day

⇒Used+to+$V_{(0)}$ 

4. I really love Ha Long Bay. I (visit) visited it twice when I was small.

⇒Có cụm "when I was small" chỉ quá khứ nên dùng past simple.

5. How about (reduce) reducing the amount of water your family uses?

⇒How about/Why don't+V_ing+O?

Chúc bạn học tốt ><

#vpgh1810

1: Be quiet! The baby is sleeping

Sau be quiet,ta thêm Ving

2:They haven't seen you for a long time

For a long time là thì HTHT

3: The used cans and bottles collect to do mini-projects every day 

Thì Hiện Tại Đơn 

4: I visited it twice when I was small 

Thì QKĐ

5: How about reducing the amount of water?

Sau How about + Ving