I saw his ———— out with some books just now. A going B go C to go D went看到事情的全过程用doing? 结果用 do?前面有经常等词的时候也用do?如果是him呢?

问题描述:

I saw his ———— out with some books just now. A going B go C to go D went
看到事情的全过程用doing? 结果用 do?
前面有经常等词的时候也用do?
如果是him呢?