Question

后置定语怎么变定语从句？（done，ing,to do三种)there be句型呢？变得定语从句，时态与原句形式有关么

Answer 1

1、The work 【done by them 】is great!
=The work 【which /that was done by them 】 is great!
过去分词短语作定语，可以变为被动式的定语从句，强调动作已经完成。时态要根据句子意思关系判断。
The house 【being built by them】 is wonderful！
=The house 【which is being built by them】 is wonderful！
v-ing作定语，强调动作正在进行，变为定语从句，时态经常和主句一致。
I have many 【exercises to do 】today！
=I have many 【exercises which are for me to do 】today！
不定式作定语，表示将来动作。变为定语从句，时态经常和主句一致。
2、There be 句型中，非谓语动词一般被认为是做定语。例如：
There are a large number of people【 dancing on the plaza.】
=
There are a large number of people【 who are dancing on the plaza.】
其中的变化和一般句型中相似。
祝你开心如意！

追问

后置定语3种情况怎么应用

追答

看看下面的例句，你就会理解了——
I have something important 【to do 】at 4 pm .Please remind me of it then.
He is the first 【to come】 and the last 【to leave 】the classroom everyday.

The new railway 【being built 】now will be of great help to the future development of the area.

The work 【done by them 】is of high standard.

Answer 2

在there be 句型中，常用这三种非谓语动词作定语，过去分词表示已经完成或被动的动作；现在分词表示正在进行的主动的动作，不定式表示将来的动作。如：
1.There is not much time left . 剩的时间不多了。
2.There are a lot of people living in the neighbourhood . 这里住着很多人。
3.There will be a lot of things to do this Sunday .

Answer 3

关键是同时去掉主谓语（要求谓语必须是be动词）
The work 【which was done by them 】 is great!
The work 【 done by them 】 is great!