the use they are ________ the waste helps to save a lot of money.A. made of B. made from C. making up of D. making of我知道选D.但是想分析一下这个句子的成分.解释选D的原因.谁能给我解释下,介词+关代,什么时候关代前面要加介词,什么时候介词放在从句的谓动后面.是不是介词的位置很随意?前后都可以?
问题描述：
the use they are ________ the waste helps to save a lot of money.
A. made of B. made from C. making up of D. making of
我知道选D.但是想分析一下这个句子的成分.解释选D的原因.
谁能给我解释下,介词+关代,什么时候关代前面要加介词,什么时候介词放在从句的谓动后面.是不是介词的位置很随意?前后都可以?
答
这是定语从句。分成两句，你就明白了：
1 The use helps to save a lot of money.
2 They are making use of the waste
再合并起来：the use （that（==use））they are __making _（_use_把这个use去掉_）of__ the waste helps to save a lot of money.
再进一步：The use (THAT) they are ___MAKING OF _____ the waste helps to save a lot of money.
答
make the use of 短语,利用
此句为强调句,强调the use
主语是,They are making the use of the waste
谓语 help to save
宾语 a lot of money
不知道你说的介词什么位置前后,不过一般定语的话主语一般不会出现介词,这个跟所用的短语有关,一般放在之后