of which 定语从句

of which 定语从句

1.The house of which the windows are broken is empty. 这句话,我楞是没看明白 of which做什么成分,能把他拆成两句我看看.
which代替先行词the house引导定语从句。把它的位置换一下，你就明白了。
The house （the windows of which are broken ）is empty.
The house the windows of which are broken is empty. 这句还好理解.
两句一样。
也就是the windows of which ，of which the windows 位置可以互换。
2.He has three brothers, of whom Li Lei is the youngest one. 它有三兄弟，李蕾是他们中最小的一个。

There are many countries in Asia, of which China is the largest one. 亚洲有很多国家，中国是最大的一个。 （of which 做什么成分）
There are many countries in Asia. China is the largest one of (many countries in Asia= which ).

①of which the engines相当于the engines of which
②which 能跟介词短语一起使用
③是scientist