Unit 2 Grammar
一、【课前导学】
1. 章节_______________________________ 2. 离开去上海 ______________________
3. 从事一项历史研究 __________________ 4. 一双软底运动鞋____________________
5. 上网查信息_________________________ 6. 给…写电子邮件___________________
7. 打开电脑 __________________________ 8. 练习弹钢琴_______________________
9. 参加比赛___________________________ 10. 前天_____________________________
11. 产生巨大影响 12. 改变我们的生活方式
13. 在古代 ___________________________ 14. 变质 __________________________
15. 手工洗衣服______________________ 16. 因为洗衣机的发明___________________
二、仔细读P26表格,结合资料,总结
一般现在时与现在进行时
①概念不同
一般现在时表示主语经常性习惯性的动作或存在的状态,也表示说话者的能力及自然现象;而现在进行时表示说话时(瞬间)正在进行的动作,也表示目前或现阶段一直进行的动作。如:
She often does her homework in the evening.她经常在晚上做家庭作业。
She is doing her homework now.她现在正在做家庭作业。
②构成方式不同
一般现在时中谓语动词的构成有两种:be动词的一般现在时形式:am, is, are;行为动词一般现在时形式有动词原形或第三人称单数形式。
而现在进行时中谓语动词的构成是:am/is/are + doing
③时间状语不同
一般现在时的时间状语主要有:always, usually, often, sometimes, never, every day, on Mondays等,而现在进行时的时间状语主要有:now, these days, this week, at the moment等,有时句首有Look! Listen!或It’s+时刻等存在。如:
We play football on Sundays.我们在星期天踢足球
My mother is reading a newspaper now.妈妈正在看报纸。
三、完成书本26页练习
四、阅读27页表格,认真比较一般过去时与过去进行时
①形式结构上的区别
a.一般过去时的形式结构为:主语+动词过去式+其他。如:
I got up at six yesterday.我昨天六点起床的。
b.过去进行时的形式结构为:主语+was/were+动词的现在分词+其他。如:
He was reading a book when the teacher came in.
当老师进来时,他正在读一本书。
②否定句、疑问句结构上的区别:
a.一般过去时的否定句、疑问句多是借助助动词did来实现的,此时实意动词应用原形。如:
He worked in Guannan last year.
否定句:He didn’t work in Guannan last year.
一般疑问句:Did he work in Guannan last year.
反义疑问句:He worked in Guannan last year,didn’t he
b.过去进行时的否定句、疑问句多是借助be动词was/were 来实现的。如:
He was working in the field at 4 yesterday afternoon.
否定句:He wasn’t working in the field at 4 yesterday afternoon..
一般疑问句:Was he working in the field at 4 yesterday afternoon
反意疑问句:He was working in the field at 4 yesterday afternoon,wasn’t he
五、练一练
1. The zookeeper is worried because the number of visitors _________ smaller and smaller.
A. become B. are becoming C. is becoming D. have become
2. Someone _______ at the door. Can you open it
A. knocks B. knocked C. is knocking D. was knocking
3. —Hello Susan. We haven’t seen each other for years. What ___________
----I’m studying at university.
A. are you going to do B. do you do C. are you doing
4. —I called you at 8:00 yesterday evening, but no one answered.
----Sorry . I __________ clothes for my parents at that time.
A. wash B. washed C. am washing D. was washing
5. I _______ tennis with my cousin every day when I was in America.
A. play B. played C. was playing D. has played
6. I ________ my homework when my mother _________ in.
A. is doing ,came B. was doing, come C. was doing, came
【重点点击】
一般过去时与现在完成时
①一般过去时表示过去某个时间发生的事情、存在的状态或经常发生的动作。说话的重点在于陈述过去的一件事情,不强调对现在产生的影响。如:
He visited Guilin in 1998. 他1998年参观过桂林。
时间状语:ago, yesterday, the day before yesterday, last week/year/month, in 2003, just now, once upon a time, etc.都是一般过去时的标志。
②现在完成时表示动作发生在过去,对现在造成了影响或产生了结果,不与确定的过去时间连用。如:
Jim has bought a CD.吉姆买了一张CD.(着重点是现在有CD)
时间状语:recently, lately, since…,for …,in the past few years, etc.
③区分:一般过去时的谓语动词用过去式,现在完成时的谓语构成是have/has+动词的过去分词。如:I saw him in the street just now.
My father has gone to Beijing.
参考答案
五、1. C 2. C 3. C 4. D 5. C