Question

关于非谓语动词的问题　

1) I can't imagine ___that with them.
为什么用doing而不用to do 或do

2) the film made all the students___ to tears
为什么用being caught 而不用to be caught

3) the boy had no choice but___ his master had told him
为什么用to do waht而不用to do that,do

4) Please come early. Don't keep us___ for long
为什么用waiting而不用to wait ,wait

5)he couldn't keep his eyes ___ to all this
为什么用shut而不用to shut ,shut

请给我讲讲用这些非谓语动词的规律～～～

Answer 1

1）imagine doing sth.是固定搭配

2）make sb. do sth.
　　be being done
以上的都是固定搭配. 2中应该为be being caught,但be省略了

3）what 相当于先行词＋that
如果不用what ，应该为 the boy had no choice but to do the thing that his mother had told him.
另外，have no choice but to do sth.是固定搭配

4)keep sb. doing 是固定用法

5）shut在句中是过去分词，keep sth. done 句意为：他无法对所有的这些视而不见

我觉得你对一些固定的词组并不熟悉，所以建议你以后多背些常见的词组，对你一定会有帮助的，我是学英语的，对英语比较感兴趣，希望你也能学业有成！

Answer 2

1. imagine doing 固定用法 enjoy,suggest...都是加doing
2.catch sb. doing sth. 表示抓住某人正在做某事
3.to do what 中的what是 told 的宾语 不然句子缺成分
4.shut 表示一种状态