什么时候在英语中用主将从现的语法,请具体举例

Answer 1

主将从现情况小结

主将从现问题是中考考点之一。它是指在时间状语从句和条件状语从句中，如果主句是一般将来时，从句用一般现在时替代一般将来时。常见的有以下三种情况：

一、条件状语从句的主句是一般将来时，那么从句常常用一般现在时。

如： When I grow up, I’ll be a nurse and look after patients.

我长大后要当一名护士，照顾病人。

二、如果主句是祈使句，那么从句通常要用一般现在时。

如：Don’t 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，根据需要从句多用一般现在时。

如：You should be quiet when you are in the reading room.

在阅览室时应保持安静。

练习 单项选择（中考题）：

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 B had got C will get D get

4 Don’t 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.（04 宁波）

A comes B will come 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 don’t 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 boating if it ___tomorrow. －Good idea.（）

A not rain B will rain C doesn’t rain D won’t rain

参考答案：1-5BCDBA 6-10 ACCBC

参考资料：http://school.ecp.com.cn/resource/Article_Print.asp?ArticleID=7644