主过从过,主将从现,主现从任[课堂教育]

1、重温一道引起思绪混乱的题.After a wonderful meal, they told stories and sang songs by the campfire. 表示“在之后”的句式：after+从句/doing/n. after I arrived = After my arrival 在我到达之后 完成同义句转换：when the plane arrived = After his arrival, we have a party. = = 时态使用重大的规则：（12字原则)主过从过，主将从现，主现从任【主将从现】常见的有以下三种情况： 一、When/if 引导的主句是一般将来

2、时，从句用一般现在时。Ill tell her the good news when she comes back.当她回来的时候，我将把这个好消息告诉她。If it doesnt rain, he will come here on time.如果不下雨，他会按时来这儿的。2、 如果主句是祈使句，那么从句要用一般现在时。 Dont laugh at me when I make a mistake. 我犯错误的时候不要笑话我。 三、如果主句是含有情态动词的一般现在时，从句多用一般现在时。You should be quiet when you are in the reading room.

3、 在阅览室时应保持安静。 【主过从过】常见的有以下二种情况：1. 直接引语变成间接引语2. 宾语从句中，当主句的谓语动词为过去时态时，从句须用表示过去的某种时态。例如：He asked when they would go to the party.他问他们什么时候将去参加聚会。Miss Green said she had been to Beijing before.格林小姐说她以前曾经去过北京。【主现从任】常见的有以下一种情况：在宾语从句中，当主句的时态为现在的某种时态（一般现在时、现在进行时、现在完成时等）后面从句时态不受主句限制，可选用各种适合的时态。例如：Do you know w

4、hen well have a football match?你知道我们什么时候举行足球赛吗？You know he has gone to Shanghai.你知道他已去上海了。【特别关注】1. 当宾语从句表述的是客观事实、科学真理、现在的习惯动作以及格言等时，只能用一般现在时。例如：The teacher told us that light travels faster than sound.老师告诉我们光速比音速要快。2.如果主、从句表示的动作是一前一后发生的，则先前的用过去完成，在后的只能用一般过去时态。When he got there, the train had left. 当

5、他到那儿的时候，火车已经开了。【小试身手】1. If he _ harder , he will catch up with us soon.（04 北京）A. study B. studies C. will study D. studied 2. I will go swimming with you if I _ free tomorrow.（04哈尔滨）A. will be B. shall be C. am D. was 3.If you _ a chance to study in a foreign country ,just take it .（04 苏州）A. getting

6、 B. had got C. will get D. get 4. Dont leave until he _ back.（） A. have come B. comes C. will come D. came 5. “ Shall we have the volleyball match tomorrow?” “ Oh, it will be put off if it _.（04 黄冈） A. snows B. is snowing C. snowed D. will snow 6.Tell him about the news when he _ ,John. Yes, I will.

7、（04 宁波） A.comes B.willcome C.would D.is coming 7.Tomorrow we will go to the city park_ it is sunny.（05 安徽） A.as soon as B. when C. if D. as 8.Please dont leave until your teacher _back.（05河南）A. will come B .came C. comes D. is coming 9 .I want to know if there _a sports meeting next month . If they _ it , I must get ready for it。（05青岛） A. is,will hold B. will be, hold C. will be, will hold D. will have, hold 10. Mary, what about going