基础英语课程.ppt

UNIT 4
Language
Structures
Dialogue
I
Dialogue
II
Reading
I
Reading
II
Guided
Writing
Interaction
Activity
Listening
Practice
Language
Structure
See the following sentences and pay attention to the grammar rules they use:
I would have liked to sign up, but I sprained my ankle.
She should / ought to have had more oral practice during the term.
She needn’t have learned all the dialogues by heart.
3. He may / might have gone without you.
4. She can’t / couldn’t have gone to the library.
She must have gone to the language lab.
5. You may / might as well use my bike.
I would have liked to sign up, but I sprained my ankle.

would + perfect infinitive to expressing “unfulfilled wish”
Use the structure to make sentence following the given cues.
① I intend to go skating with you yesterday but I couldn’t because my mother didn’t let me.
I would have liked to go skating with you yesterday, but my mother didn’t let me.
② I meant to sit in on Prof. Xin’s class this morning but I didn’t because I had an important meeting to attend.
I would have liked to sit in on Prof. Xin’s class this morning, but I had an important meeting to attend.
2. She should / ought to have had more oral practice during the term.
should / ought to + perfect infinitive expressing “unfulfilled obligation”
Use the structure to make sentence following the given cues.
① The exhibition was a good one. All of us visited it except John.
John should / ought to e with us.
② They bought a book for Mary but she didn’t like it.
They oughtn’t to / shouldn’t have bought the book for Mary.
She needn’t have learned all the dialogues by heart.
needn’t + perfect infinitive expressing “unnecessary past actions”
Use the structure to make sentence following the given cues.
① I wrote a summary in more than five hundred words. But the teacher only asked for 200 words.
I needn’t have written such a long summary.
② Mary went to the station an hour before the train started.
Mary needn’t have gon