1. Nurses and doctors work in hospitals.

2. This schoolbag belongs to Jim.

3. Does the performance begin at 7pm?

4. Sometimes, I get up before the sun rises.

5. Whenever she is in trouble, she calls me for help.

6. Dogs have eyesight than human.

7. She speaks four different languages.

8. The Garage Sale opens on 2nd of August and finishes on 4th of October.

9. She is a great teacher.

10. Who is this umbrella belongs to?

11. Who go to the theater once a month?

12. James often skips breakfast.

13. I rarely do morning exercises.

14. My cousin has a driving lesson once a week.

15. My father and I often play football with each other.

Công thức của thì HTĐ:
+) S +< he, she, it + V(s/es) >

          < i, you, we, they + V >
- ) S + do/does not + V

? ) Do/Does + S + V ?

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