Fill in the gaps to complete the sentences

• has to
• have to
• will have to
• don't have to
• had to
• didn't have to

1. This pasta
   [ ] be stirred continuously to prevent burning.
2. I
   [ ] play the piano for 3 hours every day to improve.
3. She
   [ ] finish 3 more books before the next exam in June.
4. You
   [ ] eat that if you are not hungry.
5. Last week I
   [ ] get up at six a.m. every morning.
6. You
   [ ] tell the whole story. We had already heard it.