when 和 if的区别

来源：学生作业帮编辑：神马作文网作业帮分类：英语作业时间：2024/11/20 15:13:03

when 和 if的区别
It is said that me taxi drivers have metal wires stuck into the passager seats. and _______ a butten is pushed, the seat will give you an electric shock.
China's laws do not seem to be the main problem, according to an officer. "There are laws and the laws are very strict. ________ we want to launch a product, there are so many things we have to do."
两个空填什么?
when 和 if有什么区别?

if 用来表示不能肯定某事是否会发生.
I'll see you in August,if I come to New York.
如果八月份我来纽约,我会来看你.
when 用来表示肯定某事会发生
I'll see you in August,when I come to New York.
八月份我来纽约时,一定来看你.
when 和 if 都可以用来表示经常发生的事情,两者没有多大差别.
如:If/when you heat ice,it turns into water.
if / when

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