Question

什么样的动词变为被动语态要后置to不定式

Answer 1

凡是省略了to的不定式作宾语补足语，变被动语态时to都要还原。常见的有：\x0d\x0a1、使役动词 make （let, have ）sb do sth \x0d\x0a2、感官动词 see （hear ,watch ,listen to , notice ）sb do sth \x0d\x0a例如：\x0d\x0a1) .We often see him play football .\x0d\x0a He is often seen to play football by us .\x0d\x0a2). The boss made his workers work 12 hours a day .\x0d\x0a The workers were made to work 12 hours a day by the boss .\x0d\x0a3) I heard her sing in the room yesterday .\x0d\x0a She was heard to sing in the room by me yesterday .

Answer 2

有些动词主动形式后接不带to
的动词不定式，但是被动时则需要恢复to,比如常用的词make
sb
do
sth
,被动be
made
to
do
sth