在主动语态中,有时可以加不带to的不定式作宾语,如:I saw him come into the book store.但如果变为被动语态时,则要将省略的to还原。当然这些动词还可以加动名词作宾语,如: I saw him coming into the book store, 如变为被动语态时,则没有变化。如:He was seen coming into the book store. [误] He was seen come into the book store. [正] He was seen to come into the book store. [析] 在主动语态中,有时可以加不带to的不定式作宾语,如:I saw him come into the book store.但如果变为被动语态时,则要将省略的to还原。当然这些动词还可以加动名词作宾语,如: I saw him coming into the book store, 如变为被动语态时,则没有变化。如:He was seen coming into the book store.