八祈使句
语法串1、祈使句的基本原则是句子以动词原形开始，但有时可加称呼主语
如：Open the wind, please. Tom, you feed the bird today, will you?
2、有时为了让语气委婉或表示客气也可在主语前添加一些固定成分
如：Will you (please) + 动词原形 Would you (please) + 动词原形
3、可以在动词前加do以加强语气。
如：Do write to me as soon as you arrive there.
4、几种特殊情况。
a) Let me try again, will you?
b) Let’s sing the English song together, shall we?
c) Let us sing the English song , will you?
d) Don’t do that again, will you?
e) Don’t do that again, won’t you?
语法精练：
1. _____ at the door before entering, please.
A. Knocked B. To knock C. Knocking D. Knock
2.---Tom, you feed the bird today, _____?
---But I fed it yesterday.
A. will you B. did you C. can you D. aren’t you
