初二上u7英语专题学案。
条件状语从句。
重难点。1.if 状语从句(一般现在时)+主句(一般将来时)
意义:如果……就会……;表示如果条件成立, 就会有某种结果,表示可能性。
2. if 状语从句和宾语从句的比较。
3. if … not与unless的用法与区别。
精讲点拨。1、if条件状语从句的概念。
条件状语从句是指一句话中表条件的句子,一般由if引导。
例如:if i get up early tomorrow morning, i will call you.
如果明天早上我起的早,我会给你打**的。
句中“明天早上早起”这句话,是“我给你打**”的一个条件,所以这里的 “ if i get up early”就叫条件状语从句,而“i will call you” 就是这句话的主句。if引导的条件状语从句是常考的知识点。
2、条件状语从句的位置。
和中文一样,if 引导的条件状语从句可以放在主句前(此时主从句用逗号隔开),也可以放在主句后。例如:
if we go by bus, it will be cheaper.
= it will be cheaper if we go by bus.
3、if条件状语从句的时态。
1.if从句用一般现在时,主句用一般将来时(will/ won’t + 动词)
if you don’t worry, you will miss the train.
如果你不赶紧的话,就会错过火车了。
if it doesn’t rain tomorrow, i will go with you .
如果明天不下雨,我会和你一起去。
2.if从句用一般现在时,主句用“情态动词+动词原形”,may/might/can、must/should等。
i may buy a car if i pass the driving test.
如果通过驾驶考试,我可能会买车。
if you go to another country, you must obey the local law..
如果你去另外一个国家,就必须遵守当地的法律。
3.if从句用一般现在时,主句用一般现在时(当表示客观事实、结果时)
if you cool stream, it turns into water.. 也可用will turn)
every time we cool the steam, it turns into water.
如果你冷却蒸汽,它就会变成水。
四.if …not 与unless的用法。
1.连词unless意为”除非…..用来引导否定意义的条件句。unless引导条件句时,主要有以下情况:
1)主句为肯定句。如:
1) you will miss the train unless you hurry up.
除非你快点,否则就会错过这班火车。
2) you’ll fail your chemistry test again unless you work harder.
除非你再加把劲,否则你化学测验还会不及格。
2)主句为否定句或含有表示否定意义的词,如:
1) unless you oil the motor regularly, it won’t run smoothly.
除非你经常给发动机上油,否则他就不会转得顺畅。
2) you will never get anywhere unless you set your goal.
你将永远不会成功,除非你给自己定一个目标。
2. unless在意义上可以理解为if…not,在有些情况下两者可以相互使用。如:
1) i can’t see unless i wear glasses. =i can’t see if i don’t wear glasses.
除非我戴眼镜,否则我什么也看不到。= 如果我不戴眼镜,就什么都看不到。
2) unless you can pay your bills, you’ll h**e to le**e.
if you can’t pay your bills, you’ll h**e to le**e.
除非你能付账,否则就必须离开。= 如果你不能付账,你就必须离开。
小试牛刀】一用括号中所给的动词的正确时态完成下列句子。
1. if (it/ rainwe/ not / go) out. we will stay at home.
2. ifthe weather/ be) nice tomorrowwe/ drive) to the coast.
3i / go) to their party, ifi / h**e) enough time.
4. ifyou/ live) in englandnot/ forget) to drive on the left.
5. unless (she/ pass) this examshe/ not/get) this job.
6i /but) that camera unlessit/cost) too much.
7. ifthey/ win) this gamethey/ be) the champion.
8you/ catch) the bus unlessyou/ run) very fast.
二用if或unless完成下列句子。
1. rachel will be pleased she passes her english emam.
2. the bus won’t stop you ring the bell.
3. i can’t read your writing you print it clearly.
4. emma will be upset she doesn’t get the job.
5. you can’t go inside the cinema you get a ticket.
巩固练习】 ) 1. if she here tomorrow, i will tell you.
a. comes b. will come c. come d. came
) 2. —tom wants to know if you will h**e a picnic tomorrow.
yes. but if itwe’ll play chess instead.
a. will rain b. rained c. is raining d. rains
) 3. if tom __the game, we'll give him a surprise.
a. win b. wins c. won d. wining
) 4. i’m waiting for my friendi'll go shopping alone.
a. if she comes b. if she won't come c. if she doesn't come
) 5. —what time will diana get to chengdu?
i’m not sure. when hei’ll call you.
a. will arrive b. arrive c. arrives d. arriving
) 6. if you __to the party, you’ll h**e a great time.
a. will go b. went c. go d. going
) 7.— what are you going to do tomorrow?
we’ll go to the library tomorrow if it __
a. isn’t rain b. rain c. won’t rain d. doesn’t rain
) 8. i’ll wake you up when he __back.
a. will b. is going to come c. comes
) 9. the studentsh**e a sports meeting this weekend if it
a. won’t; rains b. will; rains
c. won’t; will rain d. are going to; is going to rain
)10. —i hear the famous singer xu song may come to ningbo next month.
reallyhe comes, my younger sister will be very excited.
unit7八年级上
unit7 will people h e robots?一 必记单词。1.n.纸 纸张。2.pollute v.污染。3.pollution n.污染 污染物 pollute v.污染 弄脏过去式为 polluted 现在分词为polluting 4.future n.未来。常用短语为in the...
八年级英语上unit7同步
初二英语同步学案。unit 7 一 复习展示 基础篇 a 根据所给的中文意思写出对应的英文词语 涌出提取。多少 钱写下。例如在某人的脑里。做某事有困难考虑。把 放进去把 拿出来。关 灯野餐。值得 做 某事日常习惯。发出奇怪的噪音均衡的饮食。保持大脑活跃过着健康的生活。慢下来 变得迟钝。b连词成句 1...
八年级英语上unit8语法权信教育
unit8 情态动词 should,ought to,had better 一 重难点。1.重点 1 情态动词无人称和数的变化。2 情态动词后面跟的动词需用原形,否定式构成是在情态动词后面加 not 3 个别情态动词有现在式和过去式两种形式,过去式用来表达更加客气,委婉的语气。2.难点 ought ...