八年级英语下：Unit-10-Jobs-and-Chores-Part-2重难点讲解北师大版.doc

Unit 10 Jobs and Chores
一. 教学内容：
    Unit 10 part 2
  1. 现在完成时里already, yet 的用法
  2. 现在完成时延续性动词及非延续性动词的使用
3. 重点词组

二. 具体内容：
I. yet和already都是副词，意思是“已经”.常与现在完成时连用。
Already 用于肯定句。
e.g. I have already finished my homework.
    I have already done it twice.
yet 常用于否定句和疑问句中，通常放在句尾。
e.g. I haven’t finished my homework yet.
    The meeting will be held in half an hour, but they haven’t got everything ready yet.

II. 现在完成时应注意的几点。
1. 现在完成时句中常见的时间状语
A. 表示从过去一直持续到现在，不能是具体的过去时间
for + 表示一段时间的词语
since + 表示过去时间点的词语
since +表示过去的时间状语从句
eg. I have been a teacher ______  a year.
He has been at this school _______ 1992.
We have learned 1,000 English words _______ we came to this school.
B. just, already, yet, before/ ever, never
有此类副词时，常强调动作完成，不强调动作的持续.
eg. Have you _____been to Japan?
I have _____ finished my homework.
I have       finished my homework .
I haven’t finished my homework ____.

2. 区分短暂性动词与持续性动词.
表示短暂性(瞬间性)的动词在现在完成时的句中不能和一段时间连用.即for, since短语或how long问句
e.g. I have bought this pen for 2 months.
I have had this pen for 2 months.
How long have your      this pen?
The play has begun for an hour.
The play has been on for an hour.
come/arrive-be                go out –be out         leave-be away/from
begin-be on                   buy-have             borrow-keep
join- be a member of            die-be dead           catch a cold- have a cold
Ex. Correct the mistakes in the following sentences.
How long have you become a league member？
For more than one year.
Have you arrived here since last night?
Yes, you’re right.
The dog has died for a month.
He has gone to Shanghai twice.
How long have been at this school?
Since two years
Ex. Change the sentences into the present perfect.
1. My father came back from the bookshop just now.
My father ______ just ________ ______   the book shop.
2. He began to learn Chinese in 2001.
He _____ _______  Chinese since 2001.
3. The film began two minutes ago.
The film _____ ______ ______ since two minutes ago.
4. He has had the motorbike for two years.
It’s two years ______he ________  the motorbike.
He ________ the motorbike two years ______.
Two years ______ ______ since he ______  the motor bike

III. 重点词组。
1. so far --- up to now
So far the work has been easy.
2. use sth. to do sth.
They use animals to do farm work.
We use stamps to send letters.
3. as well; too; also; either;
---- My sister likes pop music. I like it too.
---- I also like it.
I don’t like football. My mother doesn’t like it either.
He is a teacher and he is a writer as well.
4. as well as
John as well as Jack were present that day.
The teacher as well as his students is here.
He is interested in painting and writing music as well.
It is a great gift for him as well as for the whole family.
5. hurry off 匆匆离去
He hurried off without a word.
6. take turns to do
The two sisters took turns to care for their sick mother in hospital.
The boys took turns to see the examiner.
7. instead of
If you are busy, I’ll ask Tom to do it instead of you.
Why did they choose Tom instead of David?

［课堂练习］
I. 对画线部分提问。
1. I have spoken to 10 people about the project .
______________________________________________________________________?
2. He has worked in Paris
_______________________________________________________________________?
3. She has spent 3 hours doing her homework .
________________________________________________________________________?
4. I have learned from the journey how to make friends.
________________________________________________________________________ ?
5. They changed the empty house into a club .
__________________________________________________________________________?
6. He has drunk one bottle of milk.
__________________________________________________________________________?

II. 填空
1. I’ve_______ fed the cat, but I haven’t washed the dishes _____.
2. _____ ____ washed the clothes yet?
Yes, I’ve ____done that/ No, I haven’t yet.
3. _____you cleaned your room yet ?
No, I haven’t.
4. Have you swept the yard____?
Yes, I’ve ______finished.
5. Have you finished your homework ____?

III. 时态填空
1. He______ (go) to America the year before last.
2. --What _____ you ______(do)?
    --I _____ (be) a teacher.
3. Do you like ________ (drink) milk?
4. He  ______ _______(not  have) his supper yet.
5. We ________________  (see) Uncle Li tomorrow.
6. Joan’s mother often _______ at four, now she      (cook)
7. He _____(read) a book when the accident     (happen).
8. _______ (travel) by air is very fast
9. Let us ______ (wait) outside.
10. The teacher told us _________ (not talk) any more.

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