Question

1. Alex, Boris and Robert (am / is / are) good nc 2. The box (am / is / are) on the table. 3. His dog (am / is / are) very nice. 4. My sisters (am / is / are) at home. — 5. His pencils (am / is / are) in the box. 6. Her t i 8. I (am / is / are) at school. 9. Liza and I (am / is / are) sisters.

Answer 1

1. Alex, Boris and Robert are good.
2. The box is on the table.
3. His dog is very nice.
4. My sisters are at home.
5. His pencils are in the box.
6. Her
7. I am at school.
8. Liza and I are sisters.

Answer 2

1. Are

2. Is

3.is

4.are

5.are

6...

7..

8.am

9.are

Answer 3

Here are the correct verb forms for the sentences you provided:

1. Alex, Boris, and Robert are good.
2. The box is on the table.
3. His dog is very nice.
4. My sisters are at home.
5. His pencils are in the box.
6. The sentence is incomplete; please provide more context.
7. I am at school.
8. Liza and I are sisters.

Note that the verb "am" is used with the pronoun "I," the verb "is" is used with singular subjects, and the verb "are" is used with plural subjects.