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英语语法: while
1. while和时间状语从句
while表示“当……的时候”，和when及as的最大区别在于，从句中总是用延续性动词或进行时态。
while可以引出一个省略了主语和系动词的分词词组。
例如:
We can talk while （we are）eating.
Water is getting hotter while (it is) heated.
2. while和让步状语从句
while也可能引出让步状语从句，表示“虽然”，置于句首。例如:
While some of the heat can be converted into mechanical work, it is never possible to recover all of it.
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3. while和并列句
while并列两个分句，相当于but，表示对比和转折。（注意比较上边的2----在句首则为让步状语从句，表示“虽然”。在中间则可以是并列关系，表示“然而”）
Some experiments are difficult while others are easy.
4. while和名词
while可做名词，表示一段时间，等于a short time。出现在以下词组中:
after a while过了一会儿；
for a while持续了一会儿;
once in a while时不时地。
Having thought for a while, he agreed to take this job.
The computers should be checked up once in a while.
英语语法：point知识点汇总
1. Point和动名词
There is no point (in)doing sth.（做某事有意义）
What's the point doing sth.?（做……有何意义？）
类似搭配的还有：
2. 后接（in）doing的几个名词：
difficulty/trouble/hardtime；interest；delight；no use/no good/harm；
persist/persevere（坚持）注意比较同义词：stick to doing；insist on doing。
3. 后接（in）doing的几个动词：
spend；waste；succeed；fail；
4. 后接（in）doing的几个形容词、副词：
busy；engaged；interested；（do）well。
一句话记忆：
只要一件事“有意义”，无论“成与败”“利与弊”“有无困难”，都要“花时间”，“坚持”带着“乐趣”和“兴趣”“忙于其中”，“做好”它，而不要“浪费”时间。
1.Apparently, I had difficulty (31)______ (adapt) myself to life in the city, let alone finding a job to my delight.
2.I had great difficulty the suitable food on the menu in that restaurant.
A. find
B. found
C. to find
D. finding
1.It’s no use __ without takingaction.
A. complain
B. complaining
C. being complained
D. to be complained
2.When Peterspeaks in public, he always has trouble the right things to say.
A.thinking of
B. to think of
C. thought of
D. think of .
答案：adapting；D；B； A
