洪恩环境英语第五册练习 12

[-1:16.00]Don't have to means"it's not necessary.
[-1:17.00]Had better means"to warn".
[-1:18.00]Can means"be able to."
[-1:19.00]Could means"it's possible."
[-1:20.00]Couldn't means"it's not possible."
[-1:21.00]Let's or Why don't we means"to suggest."
[-1:22.00]Now make sentences with appropriate auxiliaries.
[-1:23.00]Listen to this example.Advise a friend to study tonight.
[-1:24.00]You should study tonight.
[-1:25.00]Now you try it.Tell a friend that it's necessary to study tonight.
[-1:26.00]You should study tonight.
[-1:27.00]Good!"You have to study tonight"is also correct.
[-1:28.00]Now tell a friend that it's prohibited to smoke here.
[-1:29.00]You mustn't smoke here.
[-1:30.00]OK.Next,warn a friend not to drink and drive.
[-1:31.00]You'd better not drink and drive.
[-1:32.00]Very good.Now tell a friend that it's impossible for her to
[-1:33.00]know the answer to that question.
[-1:34.00]You couldn't know the answer to that question.
[-1:35.00]Next,tell a friend that it's not necessary to put his name on the form.
[-1:36.00]You don't have to put your name on the form.
[-1:37.00]Tell you friend that it's possible for her to talk to the teacher.
[-1:38.00]You could talk to the teacher.
[-1:39.00]OK.Now tell a friend that he is able to come in now.
[-1:40.00]You can come in now.
[-1:41.00]Now suggest that you and your friend take a walk.
[-1:42.00]Let's take a walk.
[-1:43.00]"Why don't we take a walk?"is also correct.
[-1:44.00]This time,advise a friend to buy a new alarm clock.
[-1:45.00]You should buy a new alarm clock.
[-1:46.00]Now tell a friend that it's now possible for her to be hungry.
[-1:47.00]You couldn't be hungry.
[-1:48.00]Warn a friend to lock the door.
[-1:49.00]You'd better lock the door.
[-1:50.00]Tell you friend that it's possible for him to stay in a hotel.
[-1:51.00]You could stay in a hotel.
[-1:52.00]Finally,suggest that you and your friend go to the movies.
[-1:53.00]Let's go to the movies.
[-1:54.00]"Why don't we go to the movies?"is also correct.
[-1:55.00]Very good!You've really learned a lot.
[-1:56.00]And this is the end of Lesson Twelve.