我不知道他是否愿意来 英语翻译

用到 be willing to

I don't sure if he is willing to come.

I wonder if he is willing to come.

用if表示多种可能，whether不太合适。

I do not know whether he is willing to.

I have no idea if he is willing to come.

i don't know whether he will come or not. 

I don't know whether he is willing to come

I don't know if he is willing to come here.