“You should'”，"Let's”，Shall we”，“You could ''造句

You should keep healthy
Let's go to play football
Shall we go to the park?
You could go to shcool by bus

You should do your homework by yourself.
Let's go shopping together.
Shall we meet at 7 o'clock?
You could take this bus to get there.

You should go to school today.
Let's go home.
Shall we go to the cinema?
You could have done better.