it be the +序数词+time用什么时态it be the +序数词+time后面从句用什么时态,只能用完成时吗?下面是一句例句It is the second time that Liu Xiang won the gold medal in the Asian Games.这一句后面用的是一般过去时,那么什么时候it be the +序数词+time后面不用完成时?

问题描述:

it be the +序数词+time用什么时态
it be the +序数词+time后面从句用什么时态,只能用完成时吗?
下面是一句例句
It is the second time that Liu Xiang won the gold medal in the Asian Games.
这一句后面用的是一般过去时,那么什么时候it be the +序数词+time后面不用完成时?