unit 12 life is full of the unexpected.
知识导航。section a (1a-2d)
基础预习】i. 请写出下面短语的意思。
1. by the time __
2. go off __
3. wake up __
4. put on
5. rush out __
ii. 尝试完成下面的句子。
1. 当我到学校的时候，我意识到我把书包落在家里了。
when i got to school, i realized imy backpack at home.
2. 在我到公共汽车站之前，汽车已经离开了。
___i __to the bus stop, the busleft.
3. 我起床时，我弟弟已经进入了浴室了。
by the time imy brother __already __in the shower.
4. garl 的爸爸在街上看到我，捎了我一程。
garl’s day saw me on the street and __mein his car.
5. 至少你到学校的时候，你只迟到了五分钟。
you got to school, you were only five minutes late for class.
重点讲练】1. by the time i got outside, the bus had already left. 当我出来时，公共汽车已经离开了。
by the time”表示“当/到……时”，引导时间状语从句。如果从句中用了一般过去时，主语中常用过去完成时；如果主句中用了将来时，从句中常用一般现在时表将来。
by the time i got up, he had already left. 当我起床时，他已经离开了。
he will be a teacher by the time he is twenty. 到他二十岁时，他会成为一名教师。
拓展】by now 表示“到现在为止”，通常与现在完成时连用。
by now i h**e collected 200 dolls. 到现在为止，我已收集了二百个布娃娃。
小试牛刀】根据汉语提示完成下面的句子，每空一词。
当我到车站时，火车已经开走了。
i got to the station, the trainleft.
长大后，他会离开这儿。
he __here by the time he __up.
2. my alarm clock didn’t go off! 我的闹钟没响。
go off 意为“发出响声”。
something was wrong with my alarm clock and it didn’t go off. 我的闹钟出毛病了，它没有响。
拓展】 go by 意为“(时间)过去；消逝”。
time goes by second by second. 时间一秒秒地消逝。
go on 继续。
please go on working. 请继续工作。
小试牛刀】单项选择。
why were you late this morning?
my alarm clock didn’t __so i overslept.
a. go byb. go on
c. go offd. go down
3. carl’s day saw me on the street and g**e me a lift in his car. carl的爸爸在街上看到我，捎了我一程。
give sb. a lift 是动词短语，意为“捎某人一程”，相当于give sb. a ride / give a ride to sb.
i’m a little late, can you give me a lift, dad? 我要迟到了，你能捎我一程吗，爸爸？
小试牛刀】根据汉语提示完成下面的句子，每空一词。
他上我搭便车去车站。
heto the station.
达标训练】i. 单项选择。
1. tom drove by and g**e me a __on the way home.
a. flightb. run
c. walkd. lift
2. when i got to the cinema, the movie __for five minutes.
a. beganb. had begun
c. had been on d. has been on
3. she will be a nurse __she graduates from the school.
a. by the time b. at this time
c. at that time d. at a time
4. the alarm is __there must something wrong with the car.
a. going on b. going by
c. going off d. going down
5. i __this morning and missed the early bus.
a. overslept b. slept
c. heldd. caught
ii. 根据汉语提示完成下面的句子，每空一词。
1. 他醒来发觉自己在医院里。
he __and found himself in hospital.
2. 看！那些孩子正向学校飞奔。
look! the children are __to school.
3. 他穿上大衣走了出去。
hehis coat and went out.
4. 你每天应该至少刷两次牙。
you should brush teeth __twice a day.
5. 他踩了我的脚，甚至连一声“对不起”都没有说。
hesorry” when he stepped on my toe.
section a (3a-4c)
基础预习】i. 根据汉语提示写出下面句中所缺的单词。
1. i got up early this morning because i didn’t want to __错过) the early bus.
2. the drop in prices was quiet __出乎意料的).
3. the __工人) fell down and got hurt.
4. the plane was flying __在上面) the clouds.
5. the river goes through the city from __西) to east.
ii. 写出下面短语的意思。
1. show up
2. be full of
3. arrive at
4. be about to
5. even though
6. wait in line
7. take off
8. think to oneself
9. turn into
10. find out
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