if和when的区别在_____ the traffic lights turn green,you can go ac

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if和when的区别
在_____ the traffic lights turn green,you can go across the street.中田填if还是when?if和when有什么区别?

“当什么的时候”用when
“如果怎麽样就会怎么样”的时候if比较合适.
if引导条件状语从句,when引导时间状语从句!
先去看看什么叫从句
条件状语从句是表示主句动作发生的前提或条件的从句.引导条件状语从句的连词有if,unless,so/as long as,as/ so far as,on condition that,in case,suppose,supposing等.条件状语从句中的谓语动词一般要用一在时或过去时代替一般将来时或过去将来时.
if
if表示正面条件,意为“如果”.
If you ask him,he will help you.
如果你向他请求,
Difficulties are nothing if we are not afraid of them.
如果我们不怕困难,困难就算不了什么了.

if和when的区别在_____ the traffic lights turn green,you can go ac You can go ____(cross) the street when the traffic lights ty the traffic lights are green.we can[ ] Go along this a____ and turn left at the traffic lights,you traffic.the.you.left.at.lights.turn 组句 () the traffic lights turn red ,you must stop. You turn left at the traffic lights 汉译是什么? Remember _____ (turn) off the lights when you leave the clas Turn off the lights or the radio when you have to go out at Turn off the lights or the radiao when you have to go out at Don't cross the street ____ the traffic lights turn green.用u Remenber to turn off the lights when you go to bed另一种英语怎么解释?