Would anyone please tell me simply when/ in which situation the followings are the same and interchangeable? and when they are not?
- of which
Thanks in advance
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In the following sentences, they are the same (first concern of yours)
'Of which' serves as a relative clause. And, a comma would make sentence clear. In below mentioned sentence, since the phrase serves as 'relative clause', I'll be needing an article to introduce door.
It's the house whose door is painted red = It's the house, of which a/the door is painted red.
In the following sentences, they are not the same (second concern of yours)
Whose house is that? cannot be written like this Of which house is that?