whether he comes himself or send a substitute is immaterial to me
Whether he comes himself or send a substitute is immaterial to me.
这是宾语从句还是主语从句.
还有It is not known yet whether they will come today.
是宾语从句还是定语从句
那都是主语从句吗。
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问2楼，为什么第二个句子是宾从。