A. Simple Present-Present Continuous
1. Many birds _ (fly) south in winter.
2. Ken _ (write) a book about the Aztec Indians. He’ll finish it soon.
3. Mandy usually _ (sit) with Sandra during history lessons. But today, Sandra is absent so Mandy _ (sit) with Beth.
4. We _ (not wear) uniforms to school.
5. My brother _ (not listen) to pop music but today he _ (listen) to Madonna.

B. Simple Present - Present Continuous - Simple Future
1. The buses _ (leave) the depot at 9 o’clock every day.
2. When I grow up, I _(become) an astronaut
3. I _ (wear) my new dress to the party tonight!
4. Jenny _ (be) back soon. You could wait for her if you like.
C. Simple Past-Past Continuous
1. My father _ (take) me to my first football game ten years ago.
2. When I _ (arrive) home, Susan _ (cry).
3. I _ (write) an email when the dog _ (come) in
4. While I _ (drive) to work, it _ (start) snowing