I don't think he went to school yesterday我认为他昨天没去学校.
我是实在看不下去了才回答的,一个初中的题,下面两个都回答错了.
告诉你原因：
首先 我认为.不.不能直接写成i think he don't .
否定必须提前,要写成I don't think.所以 上面的回答者错.
其次,I think怎么能改为I didn't think ,那意思就变成了 我过去不认为.显然,最下面的回答者错!