I.Fill in the blanks with the right modal verb (can, may, must):
1.He .... translate this text without a dictionary. - Yes, of course you may.
2.The students.... stand up when the professor 
3. ... I come in?
 

II.Make these sentences negative.
1.Sarah hears this every day.
2. We take all exams .
3.They help to wipe it.
4.Ada studies at the University.
5.The teacher checks our tests .

 III.Make these sentences interrogative.
1.The puppies drink milk from the bowl .
2.Kate hears everything at the moment.
3.Father chop the wood.
4.Don uses maple syrup for his cakes.
5.We wait for him.

 IV.Change the following sentences into the Present/ Past/Future Simple and mindthe time expressions:
1. We (to clean) the flat tomorrow
2. I (to bake) cakes every Saturday.
3.Their parents (to see) this film yesterday.