第2个回答 2013-04-08
一．祈使句
Be careful!
Please open your books.
Let me have a try.
Don’t open the door.
口诀：祈使句无主语，主语you常省去，动词原形当谓语，句首加don’t变否定。
二．感叹句：用what 和how引导，what 修饰的是名词，how修饰的是副词或形容词。
结构：What + a/an + 形+可数名词单数+（主语+谓语）！
What+形+可数名词复数/不可数名词+（主语+谓语）！
How+ 形/副 +（主语+谓语）！
_____a fine day it is! （What）
______useful work we have done! (What)
______careful my mother is! (How)
_______delicious bread it is! (What)
做题技巧：从右往左看，先划掉感叹号前的主语和谓语，剩下的是名词就用what,剩下的是形容词或者副词就用how。当然名词还需辨别可数不可数来确定是否有冠词a/an。
三．疑问句
疑问句有一般疑问句，特殊疑问句，选择疑问句，反意疑问句。
1. 一般疑问句：需要用yes或no来回答。结构：助动词+主语+谓语
Have you locked the door? Yes, I have.
Can you play the piano? Yes, I can.
2. 特殊疑问句：对句子中某一特殊部分提问的疑问句。
结构：特殊疑问词+ 一般疑问句
特殊疑问词：“非常6+1”，即6个W开头的疑问词（what/who/which/where/when/why）和1个H(How)开头的疑问词。
★how 与what的其他用法
⑴How much money do you want?
How many pictures did you buy?
How fast does he drive?
How often do you go abroad?
How many times do you go swimming in summer?
How soon will you come back?
How long have you been here？
（2）What number are you?
What color is your coat?
What time is it?
What day is it today?[