I.Fill in the blanks with the right modal verb (can, may, must):
1. He can translate this text without a dictionary. - Yes, of course, you may.
2. The students must stand up when the professor comes in.
3. May I come in?
II.Make these sentences negative.
1. Sarah doesn't hear this every day.
2. We don't take all exams .
3. They don't help to wipe it.
4. Ada doesn't study at the University.
5. The teacher doesn't check our tests.
III.Make these sentences interrogative.
1. Do the puppies drink milk from the bowl?
2. Does Kate hear everything at the moment?
3. Does your father chop the wood?
4. Does Don use maple syrup for his cakes?
5. Do we wait for him?
IV.Change the following sentences into the Present/ Past/Future Simple and mindthe time expressions:
1. We will clean the flat tomorrow
2. I bake cakes every Saturday.
3. Their parents saw this film yesterday.