Let's play football .的否定句是什么?

Let's play football .的否定句是什么? Let's play football同义句是什么? 为什么? 改为同义句：Let's play football. let's play football改为同义句 Let's play football. Let 's play football Let's play football.Great!的意思 Let‘s play volleyball 变否定句 let's play computer games 否定句 let's play footballl.否定句 把Let's play!变成否定句 Les's go to play football.的同义句是什么?