21. 请求 Requests
　　a.Can/Will/Could/Would you ...for me?
　　Will/Can/Could/Would you please . . .
　　May I have ...
　　b.Please give/pass me ....
　　Please wait (here/a moment).
　　Please wait (for) your turn.
　　Please stand in line/line up.
　　Please hurry.
　　c.Don't rush (hurry) /crowd.
　　No noise, please.
　　No smoking, please.
　　22. 劝告和建议 Advice and suggestions
　　a.You'd better (not) ..-.
　　You should/ought to . . . .
　　You need (to) ....
　　b.Shall we ..?
　　Let's ....
　　What/How about . . .
　　Why not ...
　　Why don't you ... ?
　　23. 许诺 Promises
　　I promise . . . .
　　I will give ...to you.
　　24. 表示焦虑 Expressing anxiety
　　What's wrong?
　　What's the matter (with you)?
　　I'm/He's/She's. worried.
　　Oh,? what shall I/we do?
　　25. 表示惊奇 Expressing surprise
　　Really?
　　Oh dear!
　　Is that so?
　　Good heavens !