Tom was heard to gou out just now.为什么要用被动语态,I need to have something to drink,为什么要用to drink?作什么成分?

Tom was heard to gou out just now.为什么这里要用was heard Tom was heard to gou out just now.为什么要用被动语态,I need to have something to drink,为什么要用to drink?作什么成分? The children_____sing that morning.A.heard B.heard to C.was heard D.was heard to E.were heard to she was heard to in the roomShe was heard to ______(sang)in the room. 1.It’s no use me not to complain about this matter.A) you told B) for you to have told C) your telling D) having told 2.he first heard the woman referred to as a mathematical genius.A) That was from Tom B) It was from Tom that C) It was Tom whom D) gou Mary ________ the song at a party.A．heard singB．was heard singC．heard to singD．was heard to sing Mary ____ many songs at a party.A.heard sing B.heard to singC.was heard sing D.was heard to sing Jim was w(-----)by and just heard Tom is talk with Mary tom was heard ___(sing)when we went past his room Tom was fool enough to marry that she was heard to be reading a poem帮忙翻译she was heard to be reading a poem Mary ___ some songs in her room in the morning.A.heard sing B.heard to sing C.was heard sing D.is heard to sing为什么? The girl _______ sing in the next room last SundayA.heard to B.is heard toC.was heardD.was heard to he was heard singing=he was heard to sing?dictionary tells us like this,I don't know why He ____the song in the next room last night.A.was heard sing B.was heard to sing C.heard sing DHe ____the song in the next room last night.A.was heard sing B.was heard to singC.heard sing D.heard to sing为什么? began to gou to school the year before began to gou to school the year before Tom was all smiles when he heard the news.这个was是跟Tom的,那smiles是什么意思,如果是笑容,不是变成Tom是笑容了吗.如果是动词，前面的was 干吗的