Complete the following sentences using appropriate primary auxiliaries.

1. My mother ………………………… not know how to bake a cake.

a) does

b) do

c) has

2. ……………….. you know the answer?

a) Do

b) Does

c) Has

3. …………………… you handed in your work?

a) Do

b) Have

c) Does

4. My sister ……………………… a daughter and a son.

a) has

b) have

c) does

5. He ………………… in his office.

a) is

b) has

b) are

c) does

6. I ……………….. not know who he is.

a) do

b) does

c) has

7. Rohan and Sania ………………… my friends.

a) is

b) are

c) have

8. Sophia …………………… the prettiest girl in my class.

a) is

b) has

c) does

9. Mike and his father …………….. already left.

a) has

b) have

c) do

10. …………………. she understand the gravity of the situation?

a) Does

b) Do

c) Has

Answers

1. My mother does not know how to bake a cake.

2. Do you know the answer?

3. Have you handed in your work?

4. My sister has a daughter and a son.

5. He is in his office.

6. I do not know who he is.

7. Rohan and Sania are my friends.

8. Sophia is the prettiest girl in my class.

9. Mike and his father have already left.

10. Does she understand the gravity of the situation?