if真实条件句语法及练习

1、般现在时 1. 1含be动词的一般现在时1.含义：表示一般性，经常性的动作或一般性事实。2.谓语动词的构成：am / is / are3.句型:1).肯定句:主语 + be动词+其他。注意:句子的第一个单词的首字母大写；句末加实心点。2).否定句:主语 + be动词+ not +其他。注意： 句子的第一个单词的首字母大写；在be动词后面加not ;句末加实心点。3). 一般疑问句：Be动词+主语+其他?注意：把be动词提前；句子的第一个单词的首字母大写；第一人称改为第二人称；句末加问号。肯定回答：Yes,主语+ be动词。否定回答：No,主语 + be动词 + not.4).特殊疑问句：特殊疑

2、问词 + 般疑问句?1.2含实义动词的一般现在时1.含义：表示现在的事实或状态表示现在的习惯或反复的动作2.谓语动词的构成：do/does3.动词的第三人称单数形式的变化形式(动词的适当形式)般情况下，直接在动词后面加S。例: want - wants以s,x,sh,ch,o 结尾的动词，加es。例: wash - washes ; go - goes;do -does以辅音字母加y结尾的动词，变y 为 i 再加 es。 例：try - tries4.句型:肯定句：主语+动词原形+其他。（主语非二单）主语+动词的适当形式+其他。（主语是三单）否定句：主语+ do+ not +动词原形+其他。（

3、主语非三单）主语+ does + not +动词原形+其他。（主语是三单）般疑问句：D0+主语+动词原形+其他？（主语非三单）肯定回答:丫es,主语+ do.否定回答:No,主语+do+not.Does+主语+动词原形+其他？（主语是三单）肯定回答：Yes,主语+does.否定回答：No,主语+ does +not.特殊疑问句：特殊疑问词 + 般疑问句?般将来时2.1 Be goi ng to 句型1.含义:打算要做某事准备做某事2.谓语动词的构成：be going to + V3.句型:肯定句：主语+ be going to + V 原 +其他。否定句：主语+ be + not + goin

4、g to + V原+其他。般疑问句:Be + 主语 + going to + V原+其他?肯定句：Yes,主语+ be.否定句：No,主语+ be + not.特殊疑问句：特殊疑问词+ 般疑问句?2.2 will/shall1.含义：表示将要做还没有做 2.谓语动词的构成：will / shall + V3.句型:肯定句：主语+ will / shall + V原+其他。否定句：主语+ will / shall + n ot + V原+其他。般疑问句:will / shall +主语+ V原+其他?肯定句：Yes,主语 + will / shall.否定句：No,主语+will / shall

5、+ not.特殊疑问句：特殊疑问词 + 般疑问句?If真实条件句：（主将从现）1. if意为“如果”，引导条件状语从句，可放在主句后，也可放在主句前，常用逗号隔开。2.含if引导的条件状语从句的复合句中，主句有下列情况时，从句用一般现在时表示将来意义:up.当主句为一般将来时态时。如:If your daughter comes, I will call you当主句是祈使句时。如:PI ease stay at homeif it rains tomorrow.当主句的谓语含有 can, may, must等情态动词时。女口： If he goes on smoking, it may be

6、 very bad for his health.当主句的谓语是hope, wish, want等动词时。女口： I want to go there if the rain stops.一.单项选择1.If youto the p arty, youll have a great timeif itA. will go2. IB. wentC. goher the an swer if sheme.A. can tell, will ask B. will tell,will tell, asks3. What are you going to do tomorrow? -WeA. is n

7、 t rainB. rainD. goingwill ask C. would tell, askll go to the library tomorrowD.4. What will you do if youA. goB. went5. I1.2.C. won t rainD. does nt rainto the old folks home visit?C.goi ngD. will goll give the book to him if hehere n ext Sun day.A. will come B. comesC. is comingD. CameIf hehard, h

8、e will get good grades.A. study B. StudiesC. will studyD. StudiedI want to know if Maryto the party tomorrow.A. goB. WentC. will goD.goes3. Every one must dress up. If you,they won t let you in.A. don t B. wonC. can tD.mustn t4. Mary will go to Sanya if shea five-day trip.A. have B. HadC. will haveD

9、. has5. If he comes late,he will miss the train.A. andB. SoC. /D. or二、用所给词的适当形式填空1f you(feel) tired, you(have) to have a rest.2. Wherehe(see) the film if he(have) time?3. If there(be) fewer trees, there(be) more p olluti on.4. He(dress) more casually if he(not work) on weekends.5. If Marcia(live) al

10、one, she(keep) a pet p arrot.6. La na(buy) a new dress if the old one(be) out of style.7.The twins(fight) if they(argue).8. I(have) a bake sale if I(n eed) money for educati on.9. P eter(send) me a beautiful souve nir if he(tour) Spain.10. If Mr Green(say) I am hard- work ing, my p are nts(feel)glad.11.1(go) to the beach if it(not rain) this week.12.they(have) a match if the P.E. teacher(be) busy?13.He(write) a letter to his grandparent