1) Make the sentences interrogative and negative: a) I have to take a taxi. b) We are able to meet at 5 oclock. c) You may doit yourself.2) Put the sentences in the Past and Future Tense: a) You must tell us a story. b) We cant go together. c) She may take the book.3) Use modal verbs or their equivalents : a) ... you do this work now b) I ... (not) to visit you next Sunday, because I ... to meet my brother. c) As the weather was fine, we ... to go to the country. d) They ... use a dictionary during their examp.

1) Make the sentences interrogative and negative:
      a) I dont have to take a taxi. Do I have to take a taxi?
      b) We arent able to meet at 5 oclock. Are we able to meet at 5 oclock?
      c) You may not do it yourself. May you do it yourself?
2) Put the  sentences in the Past and Future Tense:
      a) You had to tell us a story. You will have to tell us a story.
      b) We couldnt go together. We wont be able to go together.
      c) She might take the book. She will be allowed take the book.
3) Use modal verbs or their equivalents :
      a) Could you do this work now
      b) I wont be able to visit you next Sunday, because I have to meet my brother.
      c) As the weather was fine, we would have to go to the country.
      d) They can use a dictionary during their examp.