改英语复合句He did his homework before supper

改英语复合句He did his homework before supper 把He did his homework before supper改成复合句怎么改 复合句是什么He did his homgwork before supper.(改为一个复合句）He did his homework ____ ____ ____ ____. 英语:改复合句为简单句He is busy,but he'll have time tomorrow.He ____ ____ ____ ____tomorrow. Dont' worry too much about your exam.改为同义句He made his firends feel unhappy.对划线部分提问I saw the children playing on the playground just now .改为复合句我英语基础不太好,应该怎么改? 哪位帮忙做几道英语复合句的选择题21-3021. ___ twenty years old . his high school education. A. Not until he was, he did finish B. Not until was he, he finished C. Till not was he, he finished D. Not unti 英语problem:复合句变一般疑问句时（都是过去式）,把Did 提前后第2个动词用什么形式,下面我举例子eg:He found she was very ugly!(改一般疑问句）Did he find she was/is very ugly? He is often late for class.In the case,he will find some excuse to cheat his teach er in charge.改复合句 Where did he go?Do you know?怎么改成复合句 He did his best yesterday 正确形式 His father was ill, so he went hom ______ (puick) Nobody but Jim and his uncle_____A.know who is he B.know who he is C.knows who is heD.knows who he isWhat did you buy this morning?He asked me.(改成含宾语从句的复合句） 句子改成被动语态 where will she teach maths?hom many apples did you eat?everyone can understand his ideas. He did the job yesterday.改否定 He did no exercise.改同义句 does he clean up his room first his friend wanted to know?宾语复合句 his father went home.he finished his woke(until)变复合句 He did his homework at school.