1 go to the school cafeteria

-let's go to the school cafeteria

-what about going to the school cafeteria

- why don't we go to the school cafeteria

2 eat in fast food restaurant

- let's eat in fast food restaurant

- what about eating in fast food restaurant?

- why don't we eat in fast food restaurant?

3 do homework together

- let's do homework together

- what about doing homework together?

- why don't we do homework together?

4 play table tennis

- let's play table tennis

- what about playing table tennis?

- why don't we play table tennis ?

5 go to the beach

- let's go to the beach

- what about going to the beach?

- why don't we go to the beach?

6 go to shopping( thiếu go)

- let's go to shopping

- what about going to shopping?

- why don't we go  to shopping ?

⇒⇒ what about + V_ing + O : đề xuất làm gì

⇒⇒ why don't + S + V + O : tại sao lại không làm gì

⇒⇒ let's + V + O(bare) : hãy làm gì