if和weather的区别?

Question

if和weather的区别?

Answer 1

你的whether写错了.weather是“天气”.
1.if和whether在宾语从句中,都表“是否”,可换用,if更口语化,whether正式些.
当有or not时,一般用whether,而不用if.
He wants to know if/whether you can help him.
She wonders whether you'll go or not.
2.if可引起条件状语从句,whether不用于状语从句.
If you work hard,you'll succeed.
If I were you ,I would do it in another way.
3.whether可引起主语从句,表语从句,if不能用于这两种情况.
Whether you can finish it in time or not depends on yourself.
The question is whether they'll help you.