i saw him enter the teachers,office just now改被动

问题描述:

i saw him enter the teachers,office just now改被动

He was seen to enter the teachers' office by me just now. 一感(feel)二听(listen )三让(letmakehave)四看(look see watchnotice)
这类词在主动语态中是用省略to的不定式 但改被动时要加上to

Our math teacher was seen go into the office just now. Our math省略to的不定式改为被动语态时要加上to

He was seen to enter the teachers office by me just now.