he showed me how to use a computer为什么showed是过去式

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/15 15:01:50

这要看这句话出现在什么地方啊.如果一篇文章里都是过去式,当然就用过去式了.如果是一篇日记,也是过去式啊.时态是根据时间的.要具体情况具体分析.
再问：问一下，那个use需不需要变成过去式，还有解释一下，谢谢。
再答：不用啊，to do sth这是不定式吗，use 用原形就可以
再问：哦，想起来了，对了还有一个问题'只要动词原形前有to的就是动词不定式没吗'
再答：是的
再问：最后to后面必须是动词原形吗？还是有其他情况。
再答：如果非要在to 后面加个动词的话，大多数情况下是加动词原形的，但是还有其他的情况，就是那个时候的to 是介词的时候，to后面就不加动词原形了，而是加doing 形式。

He showed his watch to me show的过去式为什么是showed呢? He showed me how to do it 这句how to do it 为什么要加it吖 what to do He showed me a new English book.改为同义句 He showed me a picture of his own painting. He showed me his new book He showed me his _____ of matches he showed me his old photo 改错 He showed me it just now How about swimming的同义句和He showed me his new books的同义句 He showed a great i______ in sailing. How to use a computer properly