邀请别人：

Would you like to..........

Why don't you................

Why not do........

Let...........

Shall we...................

回答别人邀请：

Good idea!

Thank you!

I'd love to!

It‘s my honour.

That's great

No,thanks.

let' go!

回答别人的道歉

Dont' mind

It doesn't matter

That's OK

That is all right

Never mind

It's nothing.