八年级英语下册 Unit 1《Past and present》Grammar 2教案 （新版）牛津版-（新版）牛津版初中八年级下册英语教案.doc

Unit1 Past and present
Uint1 Grammar 2
【教学目标】1.学习现在完成时的时间副词和时间短语。
2.能在语境中运用现在完成时。
【重点难点】现在完成时与一般过去时在时间副词用法区别。
【教学过程】
Step One: Lead-in
The teacher can have a free talk with the students.
e.g. You have known something about Mr. Chen.
Could you tell me anything about Mr. Chen?
Step Two: Pre-task
Recently we have already known a little about Sunshine Town. I have never been there before. Have you ever been there?
S1: No, I haven’t been there yet.
T: Mr. Chen was born there. He has known it since he was very young. He has known it for a long time.
Step Three: While-task
Task 1: 1) Tell the students that we can use adverbs of time with the present perfect tense, such as already, ever, for, just, never, since and yet.
2) Some more examples:
I have just seen Millie on the playground. Has Millie called yet? No, she hasn’t.
I have not heard from Millie yet. I have done my homework already.
I have never read the novel. …
3)现在完成时与时间副词(on Page16)
for +段时间 for two days/three years
since +点时间 since last night /1992 since two days ago
since +句子 since I came here last week
already 一般用于肯定的陈述句
yet 一般用于否定句和疑问句 (否定句中常译为“还”；疑问句中常译为“已经”。)

just 刚（注意与just now的区别）
recently 近来 ever 曾经(常用于问句) never 从不
up to now till now over/in the past 10 years so far before(句尾且不加时间) eg. Have you visited our city before?
4)Exercises A.选择填空
Have you done your homework ______? (for, just, yet)
I have _______ __been to Chengdu. ever, never, yet)
He has _______ washed the dishes. (already, ever, for)
He has worked there _______ he left school. (already, just, since)
Have you cleaned your room _______? (for, just, yet)
She has known Sam _____ nine years. (for, never, since)
Have you ______ ridden a horse? (ever, for, yet)
They have ______ arrived. (ever, just, yet)
We have not completed the project _______. (already, for, yet)
B. for or since
1. We have lived here ____ 1990.
2. How long have you studied here? ___ 5 years.
3. The boy has had a bad cold _____ last night.
4. Mr. Huang has kept the books _____ a week ago.
5. I have taught in the school _____ I came here.
6. We have been friends ____ a long time.
总结: for +段时间 since +点时间 (过去时间)
since +句子(一般过去时态的句子)
C.句型转换
1. The boy has already gone home. (一般疑问句)
2. The girl has already given it to me. （否定句）
3.They have ever visited the Hainan Island before .（否定句）
总结: 1.(现在完成时）肯定句变为否定句的基本方法：
2.（现在完成时）肯定句变为一般疑问句的基本方法：
3.注意点：just、already、yet之间的关系及各自适应的句型
Step Four: Post-task 完成句子
(1) 你曾经到北京旅行过吗？
(2) 我已经看过这部电影了。
(3) 她刚刚完成作业。
(4) --他们已经去看这部电影了吗? --还没有呢。
(5) 我以前从未看过这本书。
(6) 自从他结婚以来就一直住在这里
Step Five Homework

教学反思： 本课时学习现在完成时的用法，并注意区分。学生掌握情况很好。尤其要背诵现在完成时出现的关键词的用法要注意。