Try to do. 努力去做 Try doing 尝试去做 . I was very tired. I tired to keep my eyes open， but I couldn’t.
I can’t find anywhere to live.
______， they began to get down to business. A. The holidays being over B. The holidays are over C. The holidays were over D. The holidays had been over
V+ing 及从句 的固定用法
It’s no use doing sth.
It’s no use worrying about it. There’s nothing you can do.
It’s （not） worth doing sth.
Have difficulty doing sth.
Spend time （in） doing sth.
There is no doubt that.
强调主语 It is I that/who am to blame
2. 强调直接宾语 It was a glass that Mary broke.
3. 强调间接宾语 It was him that I gave the pen to.
4. 强调介词宾语 It is this room that I am living in.
5. 强调状语 1） 时间状语 It was last year that Tom graduated from high school.
2） 地点状语 It was under the bridge that we found him.
3） 原因状语 It was for his arrogance that I dislike him.
4） 目的状语 It was for pleasure that I read it.
不仅可以是陈述句 ， 还可以是疑问句和感叹句 .
Was it you that/who lost a watch yesterday What great progress it was that you made.
强调句可以是一个从句 ， 被强调的部分也可以是从句 .
I was told that it was because he hadn’t received the invitation that he didn’t come
It was there， the police believe，——she was able to activate the recorder she kept in her bag.
A. that B.until C. which D. when
A. （should ） do
B. （should） be + 过去分词