I heard someone laughing.请问这是现在进行时吗?但是没BE动词引导,而且前面又有个HEARD

be动词的用法问题I heard him singing.我听到他在唱歌.请问这句主语后面为什么不用加 be 动词,是什 heard是延续性动词吗? I distantly heard sam laughing.Then his laughing stopped wit 过去时动词He could't help laughing when he heard the result.这里为什么 英语语法问题现在进行时的句型是：主语+Be动词+动词ing形式现在有个句子：I am come back是一般现在时的句 i heard his sister singing first ,and then laughing I heard of someone calling me from behind.这句话有错吗? 动词填空：1、When I was doing my homework,I heard someone ___(knoc He heard someone singing in the next room.请问这里的宾补sing为什么加的是i i thought i heard~为什么有2个动词 一个句子怎么存在2个动词啊 shock这个词是 及物动词,但是为什么要加be呢?比如说 I was shocked when I heard thi since引导的时间状语从句中的主句的谓语动词不是应该为延续性动词吗?为什么 I haven’t heard any n