saw sb doing/do怎么用
saw sb doing/do怎么用
saw sb doing还是was doing
see sb do/doing
find sb do/doing
see sb doing sth/to do sth I saw a girl -------(play)the vio
我还是分不清楚see sb do sth see sb doing sthi saw him __on the bus
“leave”+sb doing 还是“leave”+sb to do 还是“leave”+sb do 为什么用哪一种?
found sb doing/do sth 到底怎么区分...
关于find sb do/doing
mind sb do 还是doing
英语中的sb,do,doing,
英语中的sb do doing