2022年八年级英语语法复习if宾语从句和条件状语从句课件

1、语法 1：正确使用十 hat if/whether （是否）；who, why 等疑问词引导的宾语从句；语法 2 导的条件状语从 if （假如）弓 I句7豹什么是宾语从句？在复合句中做宾语成分的句子叫宾语从句；句的分类、引导词和语序豹宾语从原句式引导词从句语序陈述句that不变一般 疑whether 改为陈述句问句语序/if特别 疑特别 疑问 词改为陈述句问句语序倉宾语从句的时态主句 一般 现在 时一般 过去时任一时态从句保留原先句子的时态或依据实际情形而定一般现在时 f 一般过去时现在进行时 f 过去进行时 般将来时 f 过去将来时现在完成时 f 过去完成时如表客观事实、普遍真理及自然现象用

2、乞带：一般现在时注： that A 句中无词汇意义,在从句中不能充当成分 巳. g., 在 o 语当中往往石略1. I h ar （that ） he will be back in an hour （一小时后他会回来）2. He said （that ） he missed us very much .（他特别思念我们）3. The teacher told us （that ） the eailh moves around the sun （地球围着太阳转）留意：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.1.1

3、want to know if （whether ） he will go to the park with us （他是否跟我们一起去公园）2. Ask him 卫 heiher_ （iO_hexan_came （他是否能来）3. I dont know whether it is to rain or noK 是否要下雨）当句末为 onot 时,弓 I 导词只能用 whethe 而不能用 if.If 与 whether 的区 别1.I dont know _ he will come or not. 与 or not 连用只能用 whether 2.I dont care of_ he i

4、s handsome.介词后只能用whether 3. He wondered _ to stay here the next week. 与 to do 不定式连用只能用 whether 4. _ he will come is not decided .作主语只能用whether 副词 |由连接代词 what, whom, whose, which, what 及连接 when, where, how, why 引导的宾语从句1. He who could answeZhe quEio*锻能回箱这个问题）2. Do von know whom they are waiting for .（

5、砲们农孑谁）3. He asked whose handwritin 只 was the best in the class _ .（谁的有决是班上最 好的）4. PT 诃 1 me when we ll Zve a noting （我幻什么对候开会）5. Can you tell me 缺“ he is .（他衣呷儿）6. Could you tell me ho 1 can 供 t to the statipii （我该怎么去车北）7. Would you tell me *hy the trnin is late （为什么大车迟时了）把以下句子连成带宾从的复合句：1.You sucked

6、 your finger again. I hear . I hear that you sucked your finger again. 2. They will go shopping tomorrow.He told me. He told me that they would go shopping tomorrow. 3. Whose bike is this. Does anyone know. Does anyone know whose bike this is.4. Who went fishing yesterday.He asked. He asked who went

7、 fishing yesterday. . 5. How old is he . She doesnt know. She doesnt know how old he is. 6. Has he returned to America.l want to know. I want to know if he has returned to America. 7. Can Mike drive a car.Could you tell us.Could you tell us if Mike can drive a car. . 8.Did Alice work out the problem

8、 by herself. Please tell me. Please tell me if Alice worked out the problem by herself.if （假如）引导的条件状语从句 : 用法 :1. 假如主句是祈使句,从句要用一般现在时 CDont go and play football if you your homeworkdont finish Please call me if he comes next Sunday.2. 假如主句是一般将来时,if 从句就用一般现在时；If i 十 rains （从句） , I will stay at home.Ill

9、 go with you if you dont want to go alone （从句）.3.假如主句含有 must, may, c；i 等情态动词,if从句也要用一般现在时；If you drive too fast, you cna have an acciden 十. 遽篦You must stop if the traffic is red .Complete the sentences. 1f you want want to listen to music, choose choose a CD. .2f you huybuy a new camera, get get a g

10、ood one. 3.If the lightdoesrYt come not come on, wait wait for one minute.4.If it does nt worjnot work , wait- wait a minute and then try try again. 5.If you dont know not know howTo use the camera, read the instructions .Fill in the blankets with the proper form1 .If It rains rain tomorrow, I home.

11、will stastav at 2.You may pass pass the exam if youstudy study hard.3. I you want to record, light.Presspress the red 4.He asked us if everybody was be here .Have a try 用扌舌号内所给词的正确形式填空1 .If the rain stops stop tonight, we will go to the cinema.2ll buy a computer if I have have enough money.3.You wont qet not get nervous if you do do enough exercise.4f she is be kind to me , I wont argue not argue with her.5want to know if he will come come to