be seen to do和doing有神魔区别

Question

如题所述

Answer 1

be seen doing表被看到正在做某事；be seen to do 表被看到做某事（不表进行）
He was seen to read a book
He was seen reading a book

Answer 2

see sb. doing
被动句的时候to不能省略 所以be seen to do

Answer 3

be seen to do 为see sb do的被动形式，指做的全过程，be see doing 指看到正在做

Answer 4

to do表示将要做，doing表示正在做

Answer 5

to do表示将要做，doing表示正在做