19 感叹句：
20 What +名词+主语+谓语
What a beautiful girl she is!
11 How + 形容词+主语+谓语
How beautiful the girl is!
20 祈使句：
21 第二人称：
22 let+其他人称代词
23 祈使句的否定，加don’t
24 反意疑问
祈使句（第二人称）
祈使句表示请求，命令，建议，邀请等，谓语动词一律用原型，句子中通常不用主语，句末用惊叹好或者句号，用降调。
★肯定句 动词原型
例， Come here, please. Go downstairs, please. Stand up. Sit down. Be quiet. Be careful.
祈使句中如果有唤语，一定要用逗号隔开，放在句首或者句尾
Come in, Amy.
Sit down here, Tom.
Mary, give me a book please.
★否定：Don't+动词原型
Don't come here.
Don’t sit down.
Don’t stand up.
Don’t give me it.
let sb. do
Let me pass.
Let us have a rest.
Let’s have a rest.
(反意疑问)：
Let’s have a walk along the river, shall we?
Let us go out for a drink, will you?
21 倒装句：so/neither的倒装eg.
He can swim. So can I.
I didn’t go to class. Neither did I.
结构：
so/neither+be+ 主语
so/neither+助动词+ 主语
so/neither+情态动词+ 主语
一般现在时, do, does/am, is, are
现在进行时, am, is, are
一般过去时, did
现在完成时, have, has
一般将来时, will, shall,
过去进行时，was, were
过去完成时，had
过去将来时, would
22 直接引语/间接引语
如果引语的主句所用动词为过去时，那么间接引语要做相应变化：时态，人称，时间地点及指示词