发布时间 : 星期四 文章人教版初中英语八年级下册第10单元 第3课时 八下Unit10 Section A Grammar更新完毕开始阅读6c8267e0657d27284b73f242336c1eb91a373380
人教版初中英语八年级下册Unit10 I’ve had this bike for three
years.Section A （Grammar Focus-4c）学案
一、核心素养
1.学习本课时相关词汇并巩固练习含有since/for时间状语的现在完成时句式。 2.掌握延续性动词与非延续性动词在现在完成时句子中的转换。 二、自主学习
1.导入: Say some sentences about present perfect tense
How long have you had your....? _______________________________ 2.呈现：
present perfect tense现在完成时
表示从过去已经开始持续到现在的动作或状态，可以和表示“从过去某一时刻延续到现在的一段时间状语”连用，如“for+时间段”、“since+过去时间点”、“since+过去时的从句”、“since+一段时间+ago”。且for与since引导的时间状语可以相互转换。 for 和 since 在现在完成时中的应用
for与since都能与现在完成时连用，但区别较大： （1）for后须接“时间段” （2）since后须接“时间点”
( 3 ) since能引导时间状语从句(主句用现在完成时，从句用一般过去时)，而for则不能 （4）二者可以转换 for + 一段时间 = since + 一段时间 + ago
（5）均须与延续性动词连用，也可以与非延续性动词的否定式连用 （6）二者引出的时间状语往往用 how long提问
常见的非延续性动词与延续性动词转换规律：
borrow — keep buy — have put on — wear catch a cold — have a cold get to know — know get to sleep — sleep begin / start — be on go out — be out
close — be closed open — be open get to/arrive/reach — be (in) die — be dead leave — be away finish — be over fall asleep — be asleep make friends — be friends join — be in/be a member of become — be come/go/ — be + 相应的介词短语 三、训练提升：
选择for或since填空：
I have been here _____five months ago.
2. He has been a soldier ____ about two months. 3. Great changes have taken place _____ you left. 4. His grandpa has been dead ____ ten years.
5. I have studied English ______ I was 12 years old.
6. It is two years ______ I became a postgraduate student. 四交流展示：
完成4a,4b并核对答案。 五、基础过关 I.单项选择
( )1.— Your new watch is so nice! When did you buy it?
— In October. I_______it for two months.（2019 ·四川眉山）
A. had B. bought C. have had D. have bought
( )2.— Where are the teachers now?（2019?淮安）
— In the meeting room. They _____ the meeting for10 minutes. A. have begun B. have been on C. have had D. have been held
( ) 3. William Shakespeare ______ for 400 years, but his works still have great influence
today. （2016·山东青岛）
A. died B. was dying C. has died D. has been dead
( ) 4.He _____ in this factory for 20 years already. （2014·北京） A. will work B. works C. has worked D. is working II.按要求完成下列句子
1.Her parents came to China five years ago.(改为同义句) Her parents _______________ China ____ five years.
2.My father left home the day before yesterday.(用for two days改写句子) My father __________________home for two days.
3.Susan bought the umbrella the day before yesterday.(改为同义句) Susan ____________ the umbrella ________two days ago. 4. They have been here since 2000. (对划线部分提问) ____________ have they been here? 5. The old man _________ last year.
He ____________________ for a year. (die) （动词填空） 6. This factory opened twenty years ago. (同义句转换) This factory ____________________ for twenty years.