whether引导什么从句充当什么成分

　　I asked whether they could change my ticket.

　　我问他们是否可以给我换票。

　　Whether I believe you or not is irrelevant now.

　　我是否相信你，现在已无关紧要了。

　　The jury is out on whether or not this is true.

　　这是否属实尚无定论。