` - `Let's + V nguyên mẫu

` - ` What about + V-ing ?

` - ` Why don't we + V nguyên mẫu ?

` 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 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 ?