英语主将从现什么意思
答案
主将从现是指在时间状语从句、条件状语从句和让步状语从句中,如果主句表达将来含义,从句用一般现在时替代一般将来时。是一种英语语法。
解析
英语主将从现的用法
一、如果主句是将来时或表示将来含义时,那么条件和时间状语从句多用一般现在时
如: When I grow up, I will be a nurse and look after patients/ I want to 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。
四、 如果if的条件状语从句遇到变换间接和直接时 , 祈使句应用notto....
如:“Don'tclose the window if the rain stops,” she said.
→She said not to close the window if the rain stops.
常见的时间状语从句的连词有:as soon as,when,while ,as,until等
五、主将从现说的是在含有时间状语从句和条件状语从句的主从复合句中,如果主句的时态是一般将来时,那么从句要用一般现在时。
例如:I will tell him about it when he comes.
If it is fine tomorrow, we will go outing.
六、如果主句的时态是过去将来时,那么从句要用一般过去时 。例如:
He said that he would have another try if he had the chance.
I knew he could help me if he was free the next day.
主要标志有:if 、unless 、until、 when 、as soon as等。
扩展知识
使用主将从现的原则
分别主句与从句:简单而言主句就是问题的中心所在。一个句子的中心意思体现在主句中。所以判断主从关系要从意思入手。或者根据引导词来看,引导词的后面是从句。定语从句主要修饰名词与代词.主要关系词有;who whom whose which that when where why表语从句置于连系动词后面做表语。
时间状语从句 when, whenever, while, as, before, after, since, till, once, as soon as,etc.
地点状语从句 where,wherever
原因状语从句 because, since, as, for, now that, etc.
目的状语从句 in order that, so that, that, etc.
结果状语从句 so…that, so that, such…that, that, etc.
条件状语从句 if, unless, as(so)long as, etc.
让步状语从句 though, although, even if, even though, however, whatever, as,etc.
比较状语从句 as…as, so…as, than, etc.
方式状语从句 as, as if, as though, etc.
条件状语从句中,如果主句是一般将来时,从句要用一般现在时。
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