感官动词被动语态还原to
答：还原。在英语语法规则中，被动语态还原to的规则是感官动词被动要加to，listen是感官动词，所以listento的被动语态to还原。
答：谓语动词是感官动词see,watch等，使役动词make, have 等的时候变为被动语态的时候要还原to。l saw her enter a room.She was seen to enter a room.
答：感官动词如see,watch,notice,observe,hear,feel等+sb.+do/doing.也就是说既可加省略to的不定式,又可加动名词.+do;表示看或听到动作的全过程或是经常性的动作.用被动语态时还原不定式.如:see sb. do=sb be seen to do +doing:表示看或听到正在进行的动作.用被动语态应该这样变:see sb. doing=...
答：需要还原。感官动词或使役动词使用省略to的动词不定式,主动语态中不带to ,但变为被动语态时,须加上to .例：make somebody do something→somebody+ be +made to do something see somebody do something→somebody +be +seen to do something A girl saw my wallet drop when she passed by.→My ...
答：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\x0...
答：后接动词不定式省去TO 的动词(使役动词和感官动词)，如see, make , watch ,have ,He made him work for one hour.He was made to work for one hour .
答：省略to的不定式结构做宾补make/ see/ hear/watch sb. do等变成被动语态时，需要把to还原出来，变成sb. be made/ be seen/ be heard/ be watched to do.His workers were made to work for twelve hours a day.（make sb. do在被动语态中变为sb. be made to do）语态有两种：主动语态和...
答：feel, hear, see, watch, notice, observe的用法都如：see sb. do sth.都不加to，但在被动语态里都要恢复to.如：be seen to do, be watched to do
答：see sb do sth变被动语态要加to，因为do前的to被省略了。变被动语态要加上。你这里是see sb doing sth 没有省略的to，所以不存在变被动语态加to
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庾泳15952779884：
关于感官动词用于被动还原to -
19436沈爽
： 感官动词如see,watch,notice,observe,hear,feel等+sb.+do/doing. 也就是说既可加省略to的不定式,又可加动名词. +do;表示看或听到动作的全过程或是经常性的动作.用被动语态时还原不定式. 如:see sb. do=sb be seen to do +doing:表示看或听到正在进行的动作.用被动语态应该这样变: see sb. doing=sb.be seen doing. 例句:The missing boy was last seen playing near the river. 所以楼主的想法是正确的.只须记住do和doing这两种情况及其分别的意义即可.
庾泳15952779884：
关于感官动词感官动词有两种情况加ing或动原.被动语态的时候老师告诉我们要to还原.那么原句是ing怎么办呢.总不能说be seen to doing把. -
19436沈爽
：[答案] 楼主你的意思是不是比如 I saw him working in the garden yesterday 怎么改成被动语态? 可以这么改—— He was seen to be working in the garden yesterday . 有什么不明白再追问^_^希望可以帮到你
庾泳15952779884：
被动语态在什么时候要把to还回来 -
19436沈爽
：[答案] 因为主动句的时候看似是谓语动词+动词原形,实际这里不是动词原形,而是省略了to的动词不定式.举个例子,大家都知道make sb do sth,这里看似是加上的动词原形,实际是make sb to do sth,我们只是省略了这个to,而且主动句中必须省略,所...
庾泳15952779884：
被动语态需要还原不定式to的有哪些单词 -
19436沈爽
： (1)在主动语态中,make , let , hear , see , watch , notice 等词,其后跟省略to的动词不定式(动词原形),在变为被动语态时,必须还原动词不定式符号to.如:We heard him sing this song in the room. He was heard to sing this song in the room....
庾泳15952779884：
改为被动语态什么时候用by、for和to? -
19436沈爽
： 一、用to 感官动词或使役动词使用省略to的动词不定式,主动语态中不带to ,但变为被动语态时,须加上to . 例:make somebody do something→somebody+ be +made to do something see somebody do something→somebody +be +seen to do ...
庾泳15952779884：
被动语态+to的单词~~ -
19436沈爽
： 只要是和make let have类似的使役动词,主动语态都加省略to的不定式,被动语态都要还原to,也就是说只要原来省略的不定式符号都要写回来
庾泳15952779884：
【省略to的不定式变成被动语态还原to】的例()子 -
19436沈爽
：[答案] 常用的使役动词 make (let, have )sb do sth 以及感官动词 see (hear ,watch ,listen to )sb do sth ,改为被动语态时都要还原 to .例如:1.We often see him play football .---He is often seen to play footba...
庾泳15952779884：
和感官动词的被动态是不是改成todo -
19436沈爽
： 是的 感官动词 see/find/hear /watch/feel sb do sth改成被动时 sb be seen/found/heard/watched/felt to do sth
庾泳15952779884：
关于感官动词被动语态的用法感官动词后应该用to do sth还是doing sth举几个例子,谢谢 -
19436沈爽
：[答案] 你应该指的是see,hear这些词的用法吧.see sb.doing sth.表示看见某人正在做某事,see sb.do sth.看见某人做某事(强调看见过程).如:When I came in the classroom,I saw Jim talking with Lily.(强调我进入教室的那...
庾泳15952779884：
感官动词 为什么说它没有被动语态,又说它的被动语态要在感官动词后加to呢? -
19436沈爽
：[答案] 感官动词有see,watch,observe,look at, hear, listen to ,notice有被动语态! 用法:感官动词+宾语+do,在用作被动语态要补出to. 例如:I heard her sing an English song just now. She was heard to sing an English song just now.
