Use of Relative Pronoun:
(a)
Relative Pronouns
(Who/which/that/what/whose/whom) work as a Subject or Object and joins 'clauses'
with each other, in this way, relative pronouns work as a conjunction too.
1)
The pen that is here is mine. (Subject)
2)
The pen that I bought is good. (Object)
(b)
Who and
Whom are used for living things, especially for 'People' and 'Those'
1)
I know the girl who is here.
2)
I know all those who are here.
'Who' and 'Whom' are not used for non-living things, for
example;
1)
The book who is here is not mine. (incorrect)
2)
The book whom I bought is famous for cheap
articles. (incorrect)
That/which can be used in the above sentences.
(c)
'Which' is used for non-living nouns and 'that'
is used for living and non-living Nouns both.
1)
This is the girl that came here yesterday.
2)
The pen that is here is good.
'That' is used mostly for these words;
All, much, little,
anything, nothing, somebody, anybody, nobody, no one, none, superlative, degree,
the same+noun, the only+noun.
1)
He is the same man that saved me.
2)
He is the only man that can write this article.
3)
He is the greatest man that ever lived.
(d)
Whose/of which
'Whose' is used to represent relationship for Man/Animal,
sometimes for non-living Nouns too.
1)
A goat whose colour is black looks lovely.
2)
A girl whose hair is short looks like a boy.
(e)
'Of which' is used to represent relationship
for non-living Noun.
1)
A house of which the door is weak is unsafe.
(f)
Which = and this
In some sentences, which is used for whole clause, not for
single noun, please remember: 'THAT' cannot be used in this way
1)
He killed all soldiers, that was a cruel act.
(incorrect)
2)
He killed all the soldiers, which was a cruel
act. (correct)
(g)
Antecedent of relative pronoun is not kept in
Possessive Case
1)
These are the Principal's order who must be
obeyed. (incorrect)
2)
These are the orders of the Principal who must
be obeyed. (correct)
3)
I went to Rama's house who is my friend.
(incorrect)
4)
I went to the house of Ram who is my friend.
(correct)