i had not understood the problem until he explained it.我再理解,过去完成式_英语解答

i had not understood the problem until he explained it.
我再理解,过去完成式不应该是 had exlained

人气：108 ℃　时间：2020-02-09 03:53:16

解答

直到他解释后我才理解了这个问题.
这个主要讲的是not……until这个句型,“直到……才”
意思是：我先理解,没有理解.后来他给我作了解释.