2. Who is one of the
adjective clause. In our
life, whom is not usually
used.
3. Rule #1:
• whom is only used as an object; who is always used
as a subject. Who is usually used instead of
whom, especially in speaking, and put the
preposition at the end of the sentence. Whom is
generally used only in very formal English.
4. Rule #2:
• Who is normally used as the object of a verb or
preposition, but immediately after a
preposition whom is generally used: the man with
whom she lived. It would, however, be more natural
to say: the man she lived with.
• Who is usually used as the object
pronoun, especially in questions.
5. Rule #3:
• In non-defining relative clauses who or, more
formally, whom (but not that) is used and the
pronoun cannot be left out
• In defining relative clauses the object
pronoun whom is not often used. You can either
use who or that, or leave out the pronoun
completely