Why do not go swimming this afternoon?Wouldyou like to play soccer with us?的同义句

是why not go swimming 吧？
why not 表示提建议 would you like 表示询问别人的意愿，也有一点儿提建议的意思
可以这样翻译：
今天下午为什么不去游泳呢？（或今天下午去游泳怎么样？）你愿意和我们一起踢（美式）足球吗？
二楼的很全...且没有发现错误

1. Why not go swimming this afternoon?
= Why don't you go swimming this afternoon?
= What/How about going swimming this afternoon?
= Shall we go swimming this afternoon?
= Let's go swimming this afternoon.
2. Would you like to play soccer with us?
= Do you want to play soccer with us?
= Do you feel like playing soccer with us?
= Would you love to play soccer with us?
= Would you like to join us in playing soccer?
= Do you want to join us in playing soccer?
= Do you feel like joining us in playing soccer?
= Would you love to join us in playing soccer?

what about going swimming this afternoon?
what about playing soccer with us?