洪恩环境英语第五册练习 07

[-1:17.00]It's prohibited to run around.
[-1:18.00]You mustn't run around.
[-1:19.00]It's prohibited to talk loudly.
[-1:20.00]You mustn't talk loudly.
[-1:21.00]It's prohibited to touch anything.
[-1:22.00]You mustn't touch anything.
[-1:23.00]It's necessary to stop.
[-1:24.00]You must stop.
[-1:25.00]It's prohibited to make noise.
[-1:26.00]You mustn't make noise.
[-1:27.00]It's necessary to be careful.
[-1:28.00]You must be careful.
[-1:29.00]It's prohibited to play with those photos.
[-1:30.00]You mustn't play with those photos.
[-1:31.00]Good!Now tell what things are necessary for Mar Beth to do
[-1:32.00]and what things aren't necessary for Mary Beth to do.
[-1:33.00]Listen to the examples.It's necessary for Mary Beth to do that.
[-1:34.00]Mary Beth has to do that.
[-1:35.00]It isn't necessary for Mary Beth to do that.
[-1:36.00]Mary Beth doesn't have to do that.
[-1:37.00]OK.Now you do it.Remember,use has to or doesn't have to.
[-1:38.00]It's necessary for Mary Beth to do that.
[-1:39.00]Mary Beth has to do that.
[-1:40.00]It isn't necessary for Mary Beth to do that.
[-1:41.00]Mary Beth doesn't have to do that.
[-1:42.00]It's necessary for Mary Beth to work late.
[-1:43.00]Mary Beth has to work late.
[-1:44.00]It isn't necessary for Mary Beth to work late.
[-1:45.00]Mary Beth doesn't have to work alte.
[-1:46.00]It is necessary for Mary Beth to finish to show.
[-1:47.00]Mary Beth has to finish the show.
[-1:48.00]It isn't necessary for Mary Beth to finish to show.
[-1:49.00]Mary Beth doesn't have to finish the show.
[-1:50.00]It is necessary for Mary Beth to get a baby-sitter.
[-1:51.00]Mary Beth has to get a baby-sitter.
[-1:52.00]It isn't necessary for Mary Beth to baby-sitter.
[-1:53.00]Mary Beth doesn't have to get a baby-sitter.
[-1:54.00]It is necessary for Mary Beth to hurry.
[-1:55.00]Mary Beth has to hurry.
[-1:56.00]It isn't necessary for Mary Beth to hurry.
[-1:57.00]Mary Beth doesn't have to hurry.
[-1:58.00]Excellent!This is the end of lesson Seven.See you next time.