i heard him （）（sing）at that moment.为什么填singing.老师讲的him加非谓语动词什么的我没听明白,请大家帮我分析

1、When I passed his room,I heard him （）（sing） i heard him （）（sing）at that moment i heard he （）（sing）at that time第一个填sing 第二个填wassinging.麻烦大家帮我讲讲! I heard him sing a song in the next room just nom .(改为同义句）He ( ) ( )( ) sing a song in the next room just nom. 适当形式填空 I heard him （ ）(sing)in the next room.答案写的是sing,但为什么不写singing呢? I heard him singing改为被动语态which is correct?then I heard him sing? I heard him singing there改被动句是heard singing还是heard to sing They were heard ____（sing）when I walked past.They were heard ____（sing）every morning. i heard he （）（sing）at that time.为什么填was sing I heard him ____ (sing) when I passed his room该填什么?为什么这样填? The villagers had many trees ___ ( plant ) just then .They managed to make themselves ___ ( understand ) in very simple Eng .I heard the song _____（sing） in English .I heard her ___ (sing) the song in Eng.I saw him ___( open )the window .I saw th 1、When I passed his room,I heard him （）（sing）2、I always can't sleep well because I oftenhear some animals （）（make） so much noise i heard him （）（sing）at that moment.为什么填singing.老师讲的him加非谓语动词什么的我没听明白,请大家帮我分析 I heard her ＿（sing） in the next room when I came back. the,morning,I ,him,sing ,heard,song ,this .连词成句. I heard him sing in the classroom改为被动语态?someone say it should be modified likehe was heard to sing in the classroom.is that correct? 5句简单的,连词成句（英语）,急,1.sun,the,in,the,east,rises2.all,like,him,the,childern.he,often,because,makes,them,laugh3.gets,darker,and,darker,he,it,feels,afraid,so4.the,morning,i,him,sing,heard,song,this5.gave,the,father,boys,him,a,toy I often heard () (sing) in the room I heard him singing when I pass his room.改被动（主语为he）