ROMEO AND JULIET IS A PLAY ..... WHICH THE LOVERS FALL IN LOVE AT FIRST SIGHT
IN
This is the cake that I shared with her.
Defining
No extra information is given about the cake, only that you shared with a friend.
Which or that
They are used when talking about things, but "that" can't be preceded by a comma.
ROMEO AND JULIET GO TO SEE FRIAR LAWRENCE, _____ ______ HELP THEY WOULD BE UNABLE TO MARRY
without whose
Jim is the boy who you knew.
Defining
There is only one sentence as information. There is not additional information between commas
Whose
Is used when talking things that belong to us
THIS USED TO MY FLATMATE. I USED TO LIVE WITH HIM. THIS IS THE PERSON _______ _______ I USED TO LIVE.
WITH WHOM
The buggy which had a broken wheel was useless.
This could be both. It's ambiguous.
commas or no commas
defining or non-defining
Who brought the cake ____ tasted so delicious?
which or that
Where
Is used when talking about places
ROMEO AND JULIET MAKE MANY PLANS FOR THEIR FUTURE, ALL ______ ________ GO WRONG
ALL OF WHICH
Carrie is the one whose story was in the paper.
Defining
With _____ did you speak to about buying that toy?
whom
Whom
Is used when talking about people, usually after a preposition
Does he know the girl (that) John is talking to?
DOES HE KNOW THE GIRL ______ ______ JOHN IS TALKING?
WITH WHOM
Richard, with whom you talked yesterday, said he was pleased to meet you.
non-defining
We have 2 different pieces of information: that you talked with him yesterday and that he was happy to meet you
Commas are necessary in non-defining