高中英语知识点大全（66）：happen的用法
emmy rossum1、had better (not) do sth. 最好（不要）做某事
用来委婉地提出建议或劝告，had通用于各种人称和数的形式。
世界上最遥远的距离 泰戈尔①You’d better give up smoking.It do no good to your health.
你最好把烟戒掉，吸烟对健康没好处。
②she had better not come this evening. 今晚她最好不要来。
zini2、hand down(=pass down) 相传、传给
意思是“（从上代）传下来（给后代）”。
In poor families, clothes may be handed down from one child to the next.
短语：hand back 把……归还…… ；hand in 面交，提出 ；
hand out 分发 ；hand on 传阅，依次传递 ；hand over 移交。
3、happen句型归纳
(1)happen to do sth.(主语常为“人”)，意为“碰巧、恰好”。
to 后可用不定式的一般式to do，完成式to have done进行式六级查分入口to be doing。如：
You happened to be out when I came to your hou. 我到你家时，你正好出去了。typical是什么意思
She happened to have just finished reading the book. 碰巧她刚刚读完那本书。
兰迪少儿英语The two salesmen happened to be quarrelling when the manager entered.
四年级上册教学计划经理进去时两个售货员碰巧在吵架。
(2)It (so) happen that… “（如此）碰巧，恰好”。如：
It happens that he is a teacher of English. 恰好他是位英语老师。
It so happened that he was going that way too. 如此碰巧的是他也往那边走。
注意：句型(1) 和(2) 可互换，如：
I happened to have no money with me./It happened that I had no money with me.
我碰巧身上没带钱。
(3)happen to sb./sth. “短语翻译某人/物出事，发生了……情况”。
如：What has happened to your hand? 你的手怎么了？
Be careful not to let anything happen to that child. 小心别让那个孩子出任何事。
[应用]选择正确答案
①—We haven’t heard from Jane for a long time.
—What do you suppo __________to her?
A.was happening B.to happen
C.has happened D.having happened
②They happened to _______for Tianjin when we got there.
A.leave B.have left C.leaving D.had left
③If anything __________you,let me know.
A.is happened to B.is happening
C.happens on D.happens to
额发
Key:①C ②B ③Dacetaldehyde
