1.When did he arrive?-------He arrived at 2:00p.m yesterday.
2.I read his books when I was at school.I enjoy them very much.
1、从答句中看到昨天下午2：00,由此可判断出提问者问的是他什么时候到的,发生在过去,因此时态为一般过去时态.
2、从when I was at school可判断出当我过去在学校的时候,所以主句用一般过去时态.read的过去式和过去分词均为原型,只是读音有所不同.“我非常喜欢这些书.”所说的是一般情况,故用一般现在时态.