不定代词及不定副词：

        Some          any              no            every
thing  something     anything         nothing       everything
one    someone       anyone           anything      everyone
where  somewhere     anywhere         anywhere      everywhere
body   somebody      anybody          nobody        everybody
I looked for my book everywhere, but I can’t find it anywhere.
If you want go somewhere, if you want to be someone, you must wake up.
Help! Somebody? Anybody?
You are really something.
Since everybody is here, let’s begin our class.
Where did you go? I went nowhere.
Nobody is at home.
I have nothing left.
二．感叹句：
What +名词+主语+谓语
What a beautiful girl she is!
How + 形容词+主语+谓语
How beautiful the girl is!
三．祈使句：
第二人称：
let+其他人称代词
祈使句的否定，加don’t
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?