.When I passed by his door,I heard him _____________.

同义句转换：When I passed by,I saw them playing football.（改passed by) .When I passed by his door,I heard him _____________. I heard her in her room when I passed by. Ato singI heard her in her room when I passed by.Ato singBsingingCsingDsings I heard someone open the door when I passed by 改错 .When I passed by his door,I heard him _____________.A、singB、 第3 I,passed,heard,her,when,I,singing,by.(连词成句） playing,were,they,childern,by,when,volleyball,passed,watching,their,I连词成句 I heard them giggle when I passed by the girls.请对本句 I heard them giggle 进行语法分析。 when i passed the river为啥用passed. 填入适当形式的词语 I found some kids (dance) in the classroom when I passed by. I found a man ____ (lock) the door when I passed by.填入适当形式的词语 英语2.She pretended _______ me when I passed by.2.She pretended _______ me when I passed by.a.not to see b.not seeing c.to not see d.having not seen 为什么 she pretended not to see me when i passed by为什么这里要用not to see? she pretended not to see me when i passed by这里为什么用not to 而不用doesn't? i heard someone___(cry)in the next room when i passed by 什么理由i heard her___(cry)in the her room last night。又是什么？ 主动变被动1.I heared her sung an English song just now.2.I heard her singing an Englishi song when I passed by her room yesterday. When I passed by the station,I saw the accident _____.A.happening B.happens C.happened S.happen 怎么选 I saw a little boy trying when i passed the park passed能改成passing吗?