be seen to do,see sth done

be seen to do,see sth done

be seen to do表示被看到做整个事的全过程；而be seen doing则表示被看到在做某事.如：They were seen to sing a song.(他们被人看到唱歌了.)They sere seen sin1. be seen doing和be seen to do的区别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

beseen后⾯跟什么see是感官动词。see sb. do/doing sth。be seen to do，被看见做了什么事。be seen doing，被看见正在做某事。例如：They were seen to sing a song.他们被虽然be seen to do sth 不是常用的，但是被动语态有它存在的意义，不常用跟不用是两个不同的概念，熟练地遨游于语法世界何尝不是一种令人羡慕的能力呢。四、see to See to，是一个

see sb doing sth 看见某人正在做改成被动语态是sb be seen doing 不能加to see sb do sth 看见某人做了某事，do是不带to 的不定式，做宾补，改为被动是be seen tobe seen后面跟什么see是感官动词。see sb. do/doing sth。be seen to do,被看见做了什么事。be seen doing,被看见正在做某事。例如：They were seen to sing a song.他们被人看到唱

be seen to do sth的用法是被动语句才存在的，seen是see的过去分词。be seen sb to do/doing sthbe seen to do sth 和be seen do sth 有什么不同？?举实例说明没有be seen do sth.原型是see do变为被动语态要加to,即be seen to do sth. be seen to do sth.表示主语做的动作