Adjective Clauses: Essential vs Nonessential

Identify whether the underlined clauses are essential or nonessential:

1- I want the dog that is black and white.

• Essential

• nonessential

• none of them

2-Could you bring me the cup that is on the table?

• Essential

• Nonessential

3-Lisa, who takes ballet with Jan, is my best friend.

• Essential

• Nonessential

4- I won first prize, which was a blue ribbon.

• Essential

• Non essential

5-My grandfather, who lives on a farm, said he would teach me to ride a horse.

• Essential

• Non essential

6-The school library, which is next to the cafeteria, is my favorite place in the school!

• Essential

• Non essential

7-The time when I go to bed changes in the summer.

• Essential

• Non essential

8-I do not remember the day that my cousin was born.

• Essential

• Non essential

9-Mary, whose mom is a nurse, sits behind me in class.

• Essential

• Non essential

10- Lisa, who takes ballet with Jan, is my best friend.

• Essential

• Non essential