tom was heard ___(sing)when we went past his room

tom was heard ___(sing)when we went past his room Tom was heard to gou out just now.为什么这里要用was heard He was happy when she ___ this1.heard from2.heard of3.heard4.listened Everyone except Tom was there then为什么是was?不是si?为什么是过去式? 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? Jim was w(-----)by and just heard Tom is talk with Mary At last Tom started ___(know)who the man was. 句型转换：1.Si Yu taught herself English when she was five years old Si Yu ____ English ___ when When he was thirty,Tom moved to Lundon.At the ___ ____thirty ,Tom moved to Lundon. He was so ___(please) when he heard that his father would come to see him. I was reading ___ I heard someone calling my name.A while B when I have not heard from TOM recently,I know he is too busy ___(write) to me 理由 1.all the students in my class are kept ___(read)books after school .2.just now they saw the old houses ___(pull)down by the worker .3.Tom was going through the crowd when he heard his name __(call) 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 Do you know Tom kept ___ by his parents until he was fifteen?oh,he's the laziest boy I’ve ever heard.答案是dressed 想问keep dressed是个什么用法 为什么可以直接用被动 而不要be动词另一个也是跟被动有关What colour wil I have got a n_____ room with some flowers.He was l_____ in the rain yesterday.Tom heard a noise ,and looked a_______,but there was nobody. all this proved that tom was right all this proved tom ___ ____ right.(改为同意句） Tom felt upset when he heard the news．（对划线部分提问）划线的是upset.___ ___Tom feel when ...Tom felt upset when he heard the news．（对划线部分提问）划线的是upset.___ ___Tom feel when he heard the news