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？

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？
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？

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.