新编英语教程第二册Unit4课件

Unit 4
1. 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.
Unit 4
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.
may / might + perfect infinitive indicating “speculations about past actions” Use the structure to make sentence following the given cues. ① Where is Susan? I want to go to the canteen with her. She may / might have gone there already.
UNIT 4
Language Structures Reading II Dialogue I Guided Writing
Unit 4
Dialogue II
Trawenku.baidu.comslation
Reading I
Quiz
Language Structure
See the following sentences and pay attention to the grammar rules they use:
Unit 4
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 have come 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.
② Mary went to the station an hour before the train started. Mary needn’t have gone to the station so early.
Unit 4
3. He may / might have gone without you.
Unit 4
1. I would have liked to sign up, but I sprained my ankle. 2. 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.
② I’ve been looking for my bicycle key for three days, and it’s still nowhere to be found. You may / might have lost it.
Unit 4
4. She can’t / couldn’t have gone to the library. can / could not + perfect infinitive indicating “negative deduction about past actions” Use the structure to make sentence following the given cues. ① Where is my type writer? Someone must have stolen it last night. It was here a moment ago. It couldn’t have been stolen last night. ② Who brought the refrigerator upstairs? Perhaps it was Tim. Tim’s not that strong. He couldn’t have brought it by himself.