It is not known whether/if they will come today.
It is not known whether/if they will come
还是
It is not to known whether/if they will come
人气：335 ℃ 时间：2020-03-21 01:51:51
解答
It is not known whether/if they will come 正确不应该是It is not to do sth. 或者： It does not do sth. 吗?这是被动语态，不被人知道 be+动词的过去分词 所以是 it isn't known
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