if引导的条件状语从句和宾语从句word版本
- 格式:doc
- 大小:50.00 KB
- 文档页数:5
If带领的宾语从句战条件状语从句之阳早格格创做【沉面、易面】1. 含有if带领的条件状语从句的复合句中主从句的时态.2. If带领的宾语从句取条件状语从句的辨别.【考情分解】常常正在单项采用、完形挖空或者补齐、完毕句子等题型中考查,分值约3—4分.【知识道解】宾语从句【例句】I want to know if he lives there.He asked me if I could help him.【考查面】if、whether带领的宾语从句的辨别:从含意、连词汇、语序战时态等圆里区别.1.含意if或者whether带领宾语从句时,做“是可”道,二者常可换用,正在心语中多用if.【例句】Nobody knows whether / if it will rain tomorrow.Lucy asked whether / if they had a cotton sweater.2.取连词汇(副词汇)闭系if或者whether既没有克没有及战that 或者其余连词汇(副词汇)共时使用,也没有克没有及简略.【例句】[误] I don’t know that if(whether) he will come here today.[正] I don’t know if(whether) he will come here today.[误] He came to see what if (whether) there was anything wrong with his cat .[正] He came to see if (whether) there was anything wrong with his cat .3.语序if或者whether带领宾语从句时,虽具备疑问的意义,但是其从句应用报告句的语序.【例句】The old woman asked me if / whether I knew the way to the hospital.4.时态if或者whether带领的宾语从句应战主句的时态脆持普遍.即主句为普遍当前时,从句用任一种时态;主句为普遍往日时,从句则用往日时中的任一种时态.【例句】I don’t know if (whether) he has come here.Tom asked if (whether) I had read the book.5.只可用whether的情况(1)正在动词汇没有定式之前只可用whether【例句】I can’t decide whether to stay.(2)正在whether …or not 的牢固拆配中【例句】I want to know whether it’s good news or not.(3)正在介词汇后,只可用whether【例句】His father is worried about whether he loses his work.(4)用if会引起歧义时【例句】Could you tell me if you know the answer? 那句话有二种意义:“您能报告尔您是可了解问案吗?”或者“如果您了解问案,请报告尔,佳吗?”. 如用whether则可预防歧义.状语从句if带领的条件状语从句:从含意、时态战用法三个圆里去钻研.1.含意条件状语从句是正在复合句中做条件状语的句子,if做”如果、假若”道.【例句】 You will catch the bus if you get up early.2.时态(1)主祈从现:主句是祈使句, 从句是由if带领的使用普遍当前时的句子.【例句】If you want to go, please tell me.Print the photo if you like it.(2)主将从现:指if带领的条件状语从句用普遍当前时,主句用普遍将去时.【例句】If it doesn’t rain tomorrow, we’ll go to t he Great Wall.If you don’t get up early, you will be late for school.(3)主情从现当主句是普遍当前时(含情态动词汇can, may, must等的句子),从句也用普遍当前时.【例句】 You must see the doctor if you are ill.3.用法(1)位子if带领的条件状语从句,既可搁正在主句之前也可搁正在主句之后.当从句置于主句之前时,时常使用逗号取主句隔启.【例句】You will catch the bus if you get up early. =Ifyou get up early, you will catch the bus.(2)正在if带领的条件状语从句中,当主句是普遍将去常常,没有克没有及使用be going to结构,而要用will.【例句】I’ll help you with your English if I am freetomorrow.(3)正在if带领的条件状语从句中没有克没有及使用some,而要用any.【例句】If you have any questions to ask, please cometo my office.(4)共义句变换,if带领的条件状语从句可变换成简朴句,其要领如下:“祈使句+and/ or+简朴句”结构.其中and表示句意逆启,or表示句意转合.【例句】If you work hard, you’ll pass the exam.=Work hard, and you’ll pass the exam. If you don’thurry up, you’ll be late.=Hurry up, or you’ll be late.。
If的用法if的条件从句分为真实条件从句和虚拟条件从句。
真实条件从句:真实条件从句适用于主将从现,是假设有可能发生的。
一.位置在 if引导的条件状语从句中,既可以放在主句之前,也可以放在主句之后。
若if条件句放句首,从句后面要加逗号,和主句隔开。
You will catch the bus if you get up early. = If you get up early, you will catchthe bus.二.时态1.(主祈从现)主句:一般现在时态(包含祈使句和含有情态动词can, may, must 等的句子)从句:一般现在时态2.(主将从现)主句:一般将来时态从句:一般现在时态3. 从句 : 现在进行时,主句: 一般将来时If you are looking for Peter you’ll find him upstairs. 如果你是在找彼得,上楼就会找到他。
4. if从句用现在完成时,主句用一般将来时If you have finished dinner I ’ll ask the waiter for the bill.如果你吃完了,我就叫服务生来算账条件句谈论的是重复发生和预示要发生的情景和事件,则主从句大多用一般现在时态。
如: If bears are in danger ,they attack people.三.注意事项1. 在 if引导的条件状语从句中,当主句是一般将来时态时,不能使用be going to结构,而要用 will.2.在 if 引导的条件状语从句中 , 不能使用 some, 而要用 any.四.同义句转化1.借助于祈使句 +and∕ or+ 简单句转化, and 表示顺承, or 表示转折。
例如: (1)If you work hard, you’ ll pass the exam.Work hard, and you’ ll pass the exam.(2)If you do n’ t hurry up, you’ ll be late.Hurry up, or you’ ll be late.2.借助于介词 with 或者 without 来转换例如: If you help me, I’ll finish my job soon.With your help , I’ll finish my job soon.if 条件句不一般 , 几个要点记心间条件句 , 放在前 , 逗号要放句中间。
重点、难点之巴公井开创作1. 含有if引导的条件状语从句的复合句中主从句的时态。
2. If引导的宾语从句与条件状语从句的区别。
考情分析通常在单项选择、完形填空或补全、完成句子等题型中考查,分值约3—4分。
知能提升(一)知识讲解【认知讲解】I. if引导的宾语从句if 引导宾语从句时,意思为:是否,从句的时态通常要和主句坚持一致。
【例句】I want to know if he lives there.我想知道他是否住在那儿。
He asked me if I could help him.他问我是否能帮他。
【考查点】if、whether引导的宾语从句的区别1. if或whether引导宾语从句时,作“是否”讲,常放在动词ask、see、say、know和find out等后面。
一般情况下,两者常可换用,在口语中多用if。
【例句】Nobody knows whether / if it will rain tomorrow.没有人知道明天是否下雨。
Lucy asked whether / if they had a cotton sweater.露西问他们是否有棉制的毛衣。
2. if或whether引导宾语从句时,要注意三个方面,即连词、语序和时态。
if或whether既不克不及和that 或其他连词(副词)同时使用,也不克不及省略。
【例句】我不知道他今天是否会来。
[误]I don’t know that if(whether) he will come here today.[正]I don’t know if(whether) he will come here today.他走过来看看猫是否出了毛病。
[误]He came to see what if (whether) there was anything wrong with his cat .[正] He came to see if (whether) there was anything wrong with his cat .if或whether引导宾语从句时,虽具有疑问的意义,但其从句应用陈述句的语序。
重点、难点之宇文皓月创作1. 含有if引导的条件状语从句的复合句中主从句的时态。
2. If引导的宾语从句与条件状语从句的区别。
考情分析通常在单项选择、完形填空或补全、完成句子等题型中考查,分值约3—4分。
知能提升(一)知识讲解【认知讲解】I. if引导的宾语从句if 引导宾语从句时,意思为:是否,从句的时态通常要和主句坚持一致。
【例句】I want to know if he lives there. 我想知道他是否住在那儿。
He asked me if I could help him. 他问我是否能帮他。
【考查点】if、whether引导的宾语从句的区别1. if或whether引导宾语从句时,作“是否”讲,常放在动词ask、see、say、know和find out等后面。
一般情况下,两者常可换用,在口语中多用if。
【例句】Nobody knows whether / if it will rain tomorrow.没有人知道明天是否下雨。
Lucy asked whether / if they had a cotton sweater.露西问他们是否有棉制的毛衣。
2. if或whether引导宾语从句时,要注意三个方面,即连词、语序和时态。
if或whether既不克不及和that 或其他连词(副词)同时使用,也不克不及省略。
【例句】我不知道他今天是否会来。
[误]I don’t know that if(whether) he will come here today.[正]I don’t know if(whether) he will come heretoday.他走过来看看猫是否出了毛病。
[误] He came to see what if (whether) there was anything wrong with his cat .[正] He came to see if (whether) there was anything wrong with his cat .if或whether引导宾语从句时,虽具有疑问的意义,但其从句应用陈述句的语序。
初中英语――if 引导的条件状语从句在if 引导的条件状语从句中,if 和条件句位置灵活,可直接放在主句后面,若if 条件句放句首,从句后面要加逗号,和主句隔开。
还要注意前后时态一致原则.引导条件状语从句的连接词主要有:if(如果)、unless(除非)或as long as(只要)等。
unless 在意思上等于if...not。
一、条件状语从句用法1、引导条件状语从句最常用的连词是if,由if 引导的条件状语从句表示在某种条件下某事很可能发生。
如:If you ask him, he will help you.如果你请他帮忙,他会帮你的。
If you fail in the exam, you will let him down.如果你考试不及格,你会让他失望的。
另外,if 从句还表示不可实现的条件或根本不可能存在的条件,也就是一种虚拟的条件或假设,从句多用一般过去时或过去完成时。
如:If I were you, I would invite him to the party.如果我是你,我会邀请他参加聚会。
2、unless = if...not. 除非,若不,除非在……的时候例如:Let's go out for a walk unless you are too tired.=If you are not too tired, let's go out for a walk.Unless it rains, the game will be played.除非下雨,比赛将照常进行。
二、时态问题在条件状语从句中,要注意“主将从现”的规定,即主句用一般将来时,从句用一般现在时表示将来时。
例句:I will come to see you if I have time.我有时间,我就来看你。
三如果if 条件句谈论的是重复发生和预示要发生的情景和事件,则主从句大多用一般现在时态。
中考If引导的两种从句(宾语从句和条件状语从句)If引导的两种从句(宾语从句和条件状语从句)重点、难点1. 含有if引导的条件状语从句的复合句中主从句的时态。
2. If引导的宾语从句与条件状语从句的区别。
考情分析通常在单项选择、完形填空或补全、完成句子等题型中考查。
知能提升(一)知识讲解【认知讲解】I. if引导的宾语从句if 引导宾语从句时,意思为:是否,从句的时态通常要和主句保持一致。
【例句】I want to know if he lives there. 我想知道他是否住在那儿。
He asked me if I could help him. 他问我是否能帮他。
【考查点】if、whether引导的宾语从句的区别1. if或whether引导宾语从句时,作“是否”讲,常放在动词ask、see、say、know和find out等后面。
一般情况下,两者常可换用,在口语中多用if。
【例句】Nobody knows whether / if it will rain tomorrow.没有人知道明天是否下雨。
Lucy asked whether / if they had a cotton sweater.露西问他们是否有棉制的毛衣。
2. if或whether引导宾语从句时,要注意三个方面,即连词、语序和时态。
if或whether既不能和that 或其他连词(副词)同时使用,也不能省略。
【例句】我不知道他今天是否会来。
[误] I don’t know that if(whether) he will come here today.[正] I don’t know if(whether) he will come her e today.他走过来看看猫是否出了毛病。
[误] He came to see what if (whether) there was anything wrong with his cat .[正] He came to see if (whether) there was anything wrong with his cat .if或whether引导宾语从句时,虽具有疑问的意义,但其从句应用陈述句的语序。
重点、难点1. 含有if引导的条件状语从句的复合句中主从句的时态。
2. If引导的宾语从句与条件状语从句的区别。
考情分析通常在单项选择、完形填空或补全、完成句子等题型中考查,分值约3—4分。
知能提升(一)知识讲解【认知讲解】I. if引导的宾语从句if 引导宾语从句时,意思为:是否,从句的时态通常要和主句保持一致。
【例句】I want to know if he lives there. 我想知道他是否住在那儿。
He asked me if I could help him. 他问我是否能帮他。
【考查点】if、whether引导的宾语从句的区别1. if或whether引导宾语从句时,作“是否”讲,常放在动词ask、see、say、know和find out等后面。
一般情况下,两者常可换用,在口语中多用if。
【例句】Nobody knows whether / if it will rain tomorrow.没有人知道明天是否下雨。
Lucy asked whether / if they had a cotton sweater.露西问他们是否有棉制的毛衣。
2. if或whether引导宾语从句时,要注意三个方面,即连词、语序和时态。
if或whether既不能和that 或其他连词(副词)同时使用,也不能省略。
【例句】我不知道他今天是否会来。
[误] I don’t know that if(whether) he will come here today.[正] I don’t know if(whether) he will come here today.他走过来看看猫是否出了毛病。
[误] He came to see what if (whether) there was anything wrong with his cat .[正] He came to see if (whether) there was anything wrong with his cat .if或whether引导宾语从句时,虽具有疑问的意义,但其从句应用陈述句的语序。
If的用法if 的条件从句分为真实条件从句和虚拟条件从句。
真实条件从句:真实条件从句适用于主将从现,是假设有可能发生的。
一.位置在if 引导的条件状语从句中,既可以放在主句之前,也可以放在主句之后。
若if 条件句放句首,从句后面要加逗号,和主句隔开。
You will catch the bus if you get up early. = If you get up early, you will catch the bus.二.时态1.(主祈从现)主句:一般现在时态(包含祈使句和含有情态动词can, may, must等的句子)从句:一般现在时态2. (主将从现)主句:一般将来时态从句:一般现在时态3.从句:现在进行时,主句:一般将来时If you are looking for Peter you’ll find him upstairs. 如果你是在找彼得,上楼就会找到他。
4.if从句用现在完成时,主句用一般将来时If you have finished dinner I’ll ask the waiter for the bill. 如果你吃完了,我就叫服务生来算账5.if 条件句谈论的是重复发生和预示要发生的情景和事件,则主从句大多用一般现在时态。
如:If bears are in danger ,they attack people.三.注意事项1.在if 引导的条件状语从句中,当主句是一般将来时态时,不能使用be going to 结构,而要用will.2.在if 引导的条件状语从句中,不能使用some,而要用any.四.同义句转化1.借助于祈使句+an d∕or+简单句转化,and表示顺承,or表示转折。
例如:(1)If you work hard, you’ll pass the exam.Work hard, and you’ll pass the exam.(2)If you do n’t hurry up, you’ll be late.Hurry up, or you’ll be late.2.借助于介词with或者without 来转换例如:If you help me, I’ll finish my job soon.With your help , I’ll finish my job soon.if 条件句不一般,几个要点记心间条件句,放在前,逗号要放句中间。
条件句表可能,主句多用将来时;条件句表事实,主句常用现在时。
虚拟条件从句:虚拟条件从句是假设不太可能发生的。
IF的虚拟语气有三种:内容从句主句与现在事实相反动词过去式(be用were)would/could/should/might+动原与将来事实相反should/were to+动原would/could/should/might+动原与过去事实相反had+过分would/could/should/might+ have+过分下面三句依次是上面三种情况的例句:If I were you ,I would/could/should/might do that.If I had know that yesterday, I would/could/should/might have told you .If it should rain , the crops would/could/might be saved.If引导的宾语从句一.if 引导宾语从句时,意思为:是否,从句的时态通常要和主句保持一致。
【例句】I want to know if he lives there. 我想知道他是否住在那儿。
He asked me if I could help him. 他问我是否能帮他。
【考查点】if、whether引导的宾语从句的区别 1. if或whether引导宾语从句时,作“是否”讲,常放在动词ask、see、say、know和find out等后面。
一般情况下,两者常可换用,在口语中多用if。
【例句】Nobody knows whether / if it will rain tomorrow. 没有人知道明天是否下雨。
Lucy asked whether / if they had a cotton sweater. 露西问他们是否有棉制的毛衣。
二. 注意事项:if或whether引导宾语从句时,要注意三个方面,即连词、语序和时态。
1. if或whether既不能和that 或其他连词(副词)同时使用,也不能省略。
【例句】我不知道他今天是否会来。
[误] I don’t know that if(whether) he will come here today.[正] I don’t know if(whether) he will come here today. 他走过来看看猫是否出了毛病。
[误] He came to see what if (whether) there was anything wrong with his cat .[正] He came to see if (whether) there was anything wrong with his cat .2.if或whether引导宾语从句时,虽具有疑问的意义,但其从句应用陈述句的语序。
【例句】Did you know the way to the hospital? The old woman asked me.The old woman asked me if / whether I knew the way to the hospital. 老妇人问我是否知道去医院的路。
3.if或whether引导的宾语从句应和主句的时态保持一致。
即主句为一般现在时,从句用任一种时态;主句为一般过去时,从句则用过去时中的任一种时态。
【例句】I don’t know if (whether) he has come here. 我不知道他是否来过这儿。
Tom asked if (whether) I had read the book. 汤姆问我是否看过这本书。
三.If 和whether两者不能互换的情况1. 只能用whether的情况在动词不定式之前只能用whether:【例句】I can’t decide whether to stay. 我不能决定是否留下。
2. 在whether …or not 的固定搭配中:【例句】I want to know whether it’s good news or not. 我想知道它是不是好消息。
3. 在介词后,只能用whether:【例句】His father is worried about whether he loses his work.他的父亲担心他是否会失去工作。
4.用if会引起歧义时:【例句】Could you tell me if you know the answer? 这句话有两种意思:“你能告诉我你是否知道答案吗?”或“如果你知道答案,请告诉我,好吗?”。
如用whether则可避免歧义。
【考题链接】I don’t know _________ they could pass the exam or not.A. whyB. ifC. thatD. whether答案:D 解题思路:本题考查if与whether的区别,在whether…or not的固定搭配中通常只用whether。
练习题:句型转换 1. Do they want fried chicken? He asked the boys.(改为宾语从句)He asked the boys _______they ______fried chicken.2. Was the watch made in Shanghai? I don’t know.(改为宾语从句)I don’t know _______the watch _______made in Shanghai.3. “Do you want to try something new?”Tom’s mother asked him.(同义句转换)Tom’s mother asked him _____________________to try something new.答案:1. if / whether, wanted 2. if / whether, was 3. if / whether he wanted一、用所给词的适当形式填空1.If you ________(feel) tired, you _______________ (have) to have a rest.3. If there __________(be) fewer trees, there _______________( be) more pollution.5. If Marcia _____________(live) alone, she ___________________( keep) a pet parrot.6. Lana ________________( buy) a new dress if the old one ____________(be) out of style.9. Peter _____________( send) me a beautiful souvenir if he ________________(tour) Spain.10. If Mr Green ___________(say) I am hard- working, my parents _________( feel) glad.11.I ____________(go) to the beach if it________________ ( not rain) this week.13.He ____(write) a letter to his grandparents if he ____(get) his report card this week.14. If she ____________(get) up late, she _____________ ( not catch) the early bus.15. Peter ________(major) in English if he ____(pass) the exams in PekingUniversity.16. 如果努力学习,你就会取得好成绩。