英语语法复习if宾语从句和条件状语从句课件.ppt

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1、Grammar,if 从句,Revision,巧计、速记,语法1：正确使用that,if/whether（是否）,who,why 等疑问词引导的宾语从句。,语法2：if（如果）引导的条件状语从句,主祈从现主将从现从主有逗主从无逗,宾语从句,什么是宾语从句？,在复合句中做宾语成分的句子叫宾语从句。,宾语从句的分类、引导词和语序,that,不变,whether/if,改为陈述句 语序,特殊 疑问词,改为陈述句 语序,宾语从句的时态,由从属连词that引导的宾语从句,注：that 在句中无词汇意义，在从句中不能充当成分，在口语当中往往省略,e.g.I hear(that)_.（一小时后他会回来）He

2、 said(that)_.（他非常想念我们）The teacher told us(that)_.（地球围着太阳转）,he will be back in an hour,he missed us very much,the earth moves around the sun,注意：当从句是客观真理的时候，无论主句什么时态，从句一律用一般现在时,由从属连词whether,if 引导的宾语从句,e.g.1.I want to know _.（他是否跟我们一起去公园）2.Ask him _.（他是否能来）3.I dont know _.（是否要下雨）,if(whether)he will go

3、to the park with us,whether(if)he can come,whether it is going to rain or not,当句末为or not时，引导词只能用whether而不能用if.,If 与whether 的区别,I dont know _ he will come or not.I dont care of _ he is handsome.He wondered _ to stay here the next week._ he will come is not decided.,与or not 连用只能用whether,介词后只能用whether,

4、与to do 不定式连用只能用whether,作主语只能用whether,由连接代词what,whom,whose,which,what及连接副词 when,where,how,why引导的宾语从句,when well have a meeting,where he is,how I can get to the station,why the train is late,who could answer the question,whose handwriting was the best in the class,whom they are waiting for,把下列句子连成带宾从的复

5、合句：1.You sucked your finger again.(I hear.)2.They will go shopping tomorrow.(He told me).3.Whose bike is this?(Does anyone know)4.Who went fishing yesterday?(He asked),I hear that you sucked your finger again.,Does anyone know whose bike this is?,He told me that they would go shopping tomorrow.,He a

6、sked who went fishing yesterday.,5.How old is he?(She doesnt know)6.Has he returned to America?(I want to know)7.Can Mike drive a car?(Could you tell us)8.Did Alice work out the problem by herself?(Please tell me),She doesnt know how old he is.,I want to know if he has returned to America.,Could you

7、 tell us if Mike can drive a car?,Please tell me if Alice worked out the problem by herself.,用法：1.如果主句是祈使句，从句要用一般现在时。Dont go and play football if you dont finish your homework.Please call me if he comes next Sunday.,if（如果）引导的条件状语从句:,2.如果主句是一般将来时，if从句则用一般现在时。If it rains（从句），I will stay at home.Ill go

8、 with you if you dont want to go alone（从句）.3.如果主句含有must,may,can 等情态动 词，if从句也要用一般现在时。If you drive too fast,you may have an accident.You must stop if the traffic is red.,1.If you _(want)to listen to music,_(choose)a CD.2.If you _(buy)a new camera,_(get)a good one.3.If the light _(not come)on,_(wait)fo

9、r one minute.4.If it _(not work),_(wait)a minute and then _(try)again.5.If you _(not know)how to use the camera,_(read)the instructions.,want,choose,buy,get,doesnt come,wait,doesnt work,wait,try,dont know,read,Complete the sentences.,2.Youmay _(pass)theexamifyou_(study)hard.,4.Heaskedusifeverybody_(

10、be)here.,rains,will stay,pass,study,was,3.If you want to record,_(press)the red light.,press,1.If It_(rain)tomorrow,I _(stay)at home.,Fill in the blankets with the proper form,Have a try 用括号内所给词的正确形式填空,1.If the rain _(stop)tonight,we will go to the cinema.2.Ill buy a computer if I _(have)enough mone

11、y.3.You _(not get)nervous if you _(do)enough exercise.4.If she _(be)kind to me,I _(not argue)with her.5.I want to know if he _(come)tomorrow,if he _(come),I _(give)the massage to him.,stops,have,wont get,do,is,wont argue,will come,comes,will give,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，主将从现不一般；条件句表事实，主句常用现在时 If还有“是否”意,宾语从句放后边,summary,Thank you,and have a good day.,