–I _____ a rainbow in the sky after the rain.-Really?Do you know how many colours _____

问题描述:

–I _____ a rainbow in the sky after the rain.-Really?Do you know how many colours _____
in a rainbow?
A.just have seen; there are B.have just seen; are there C.just saw; there are D.have just seen; there are

看来上面两楼出现矛盾了
通过表示时态的状语:after the rain说明表示“曾经见过”,所以用完成时.
how引导宾语从句,做know的宾语,并不是引导疑问句,所以陈述语气但是有明确过去时间状语的句子不是应该用过去时态吗?如果有yesterday这种表示过去的时间的当然是过去式,但after the rain表示一种曾经观察过的情景。这题用排除法稍微舒服些,因为没有表过去的时态,所以直接排除C就行还是不明白哎。after the rain 难道不是过去的时间吗?c 就是过去时态啊。你这样想,我曾在雨后看见过彩虹,你用完成时还是过去式?肯定是翻译成I have see a rainbow after the rain。这道题是一个道理。你就这么记,凡是表示有过什么经历的句子,都是完成时。比如我去过美国,I have been tous before。或者我吃过香蕉I have eaten the banana。