verb to be

They ...... very intelligent. 

• are

• is

• am

Robert and Sarah .... at the party.

• am

• is

• are

The book ... in my backpack.

• am

• are

• is

These math equations .... difficult.

• is

• are

• am

• my

She ..... absent from class today.

• are not

• i´m

• is not

negative:

He and Mary ..... good students.

• my

• are not

• are

• is not

I ..... an only child.

• is not

• am not

• are not

interrogative:

...... brothers?

• is they

• are they

• am they

structure affirmatively:

• Subject + Verb To Be + Complement.

• Verb To Be + Complement + subject

• Subject + Verb have + Complement.

You .... in the office.

• isn´t

• aren´t