八年级英语Working with Animals教案1

八年级英语Working with Animals教案1,标签：初二下册英语教案,初中英语教案,http://www.67xuexi.com
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Unit 11 Working with Animals
一. 教学内容：
　　Unit 11 part 1
　　继续学习现在完成时来描述经历

二. 教学重点：
1. 现在完成时中ever， never 的使用。
2. 现在完成时中的两种动词的使用。
3. 现在完成时与一般现在时，一般过去时的区分。
4. 重点词组。

三. 具体内容：
（一）Present perfect with ever and never.
　　e.g.
　　Have you ever seen a polar bear?
　　I have never seen a polar bear.
　　Have you ever forgotten your homework?
　　No， never.
　　I‘ve seen a dolphin， but I‘ve never seen a whale.

（二）Two types of verbs in the present perfect.
1. There are two types of verbs in the present perfect. One type refers to an action that starts in the past and continues to the present. The time phrases with for or since are used with this type of verbs.
　　e.g.
　　He has had the book for three weeks.
　　I have worked here for two months.
　　He has been a teacher for ten years.
　　They have lived in Canada since 1997.
　　He has taught me since I came to this school.
注意：for + 时间段 如：for ten years
　　since +时间点如：since nine o‘clock
　　since + 时间段 + ago：since ten years ago
　　since + 一般过去时态从句(主句是现在完成时)
　　e.g.
　(1) They have lived in China ＿＿＿＿＿ 1998.
　(2) We have studied English ＿＿＿＿＿ 5 years.
　(3) Joy ＿＿＿＿＿ ＿＿＿＿＿＿ (learn) Chinese since she ＿＿＿＿＿ (come) to China .
　
　2. The other type refers to an action that took place at a specific time in the past and cannot continue. Usually， for or since are not used.
　　e.g.
　　He has bought a book.
　　The film has begun.
　　I have borrowed a book from the library.
　　注意：瞬间动作不能与表示一段时间的短语连用，应改用持续性动词。
　　常见的瞬间动词与持续性动词的转换。
　　come/go - be in/on go out - be out
　　leave - be away begin/start - be on
　　buy - have borrow/lend - keep
　　join - be a member die - be dead
　　catch a cold - have a cold become - be
　　fall asleep - be asleep open - be open
　　get to know - know close-be closed
　　Ex. Fill in the blanks.
　1. 这辆自行车我买了两年了。
　　I‘ve ＿＿＿＿＿ the bike ＿＿＿＿＿ two years.
　2. He left Nanjing two years ago.
　　He ＿＿＿＿＿ ＿＿＿＿＿ ＿＿＿＿＿ ＿＿＿＿＿ Nanjing for two years.
　3. The monkey died last month.
　　The monkey ＿＿＿＿＿ ＿＿＿＿＿ ＿＿＿＿＿ for a month.
　4. A： Hong long ＿＿＿＿＿ you ＿＿＿＿?
　　B： Two weeks.
　　A. did， get ill B have， fallen ill
　　C. were， ill D. have， been ill

（三）现在完成时与一般现在时的区分：
　　一般现在时表示现在较长时间内经常习惯性的动作或状态，不含有影响和结果的意味。而现在完成时强调过去发生的动作对现在的影响和结果。
　　e.g.
　　He works at our school.
　　He has worked in our school for ten years.

（四）现在完成时与一般过去时的区分：
　　虽然动作都发生在过去， 但它们强调的重点不同：现在完成时侧重于对现在的影响，而一般过去时侧重于某一动作发生在过去某个时间或某段时间，即现在完成时侧重现在的影响，而一般过去时侧重于发生的时间。
　　e.g.
　　I have seen the film.
　　I saw the film three days ago.
　　Mr. Green has bought a new computer.
　　Mr. Green bought a new computer yesterday.
　　另外，与它们搭配的时间状语也不同。一般过去时常与...ago， just now， last...， yesterday...连用\；而现在完成时与already， yet， just， ever， never， for...， since... 连用。
　　e.g.
　　She has lived here since two years ago.
　　She lived here two years ago.
　Ex.
　1. -I have seen the film Titanic already.
　　-When you it?
　　-The day before yesterday.
　　A. have， seen B. will， see C. did， see D. did， seen
　2. Mr. Black in China since five years ago.
　　A. lived B. has lived C. lives D. is going to live
　3. We trees last Sunday. So far we over 3，000 trees there.
　　A. planted， planted B. planted， have planted
　　C. have planted， planted D. have planted， have planted

（五）重点词组。
　1. continue to do
　　The old man continued to work for his company after he retired.
　　Most the students will continue to study in the same school next year.
　2. help sb. (to) do sth.
　　Children should help their parents to do some housework.
　3. make sb. do sth.
　　His boss often makes him overwork.
　4. close to

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