whether开头引导什么从句

whether开头可以引导宾语从句、主语从句、表语从句、同位语从句；

whether和if都可以表示“是否”，引导宾语从句；

当引导的从句中出现or not时，通常用whether，而不用if；

whether引导主语、表语或同位语从句。

I'm not sure whether I should tell you this.

我拿不准该不该把这事告诉你。

She asked her boss whether she could have the day off.

她问老板可不可以让她请一天假。

You've got to go to school, whether you like it or not.

不管你喜欢不喜欢，你得上学。

It's doubtful whether the car will last another year.

这辆汽车未必还能用上一年。

It remains to be seen whether his project will fly.

他的计划能否成功尚需拭目以待。

We can try that ─ but whether it'll work is another matter.

我们可以试试看——但行不行则是另一回事。