I don't know what his name is和I don't know what time is it为什么后者多了一个it?

问题描述:

I don't know what his name is和I don't know what time is it为什么后者多了一个it?
第二个打错了,是I don't know what time it is,为什么第二个要比第一个多一个it?

第二句应该是 I don't know what time it is .(陈述语序)
第一句对.这两个句式差不多,那为什么第一个不要加it?因为第二个句子没有主语,所以要用it

第一句的主语是his name