He started to complain about the wicked world but was interrupte by a knock at the door.1、在句中做什么成份,but 后为什么没有主语?2、这是一个复合句吗?

he started to learn the piano when he was 连词成句：he a factory to started work in He started to learn the piano when he was seven改为同义句He started to learn the piano ____ ____ ____ _____seven四个空 He sat down and _______to us.A.started talking B.started telling C.begin to speaking D.begin saying He started to learn the piano when he was five years old(改为同义句) He started to learn English when he was 3.(改为同义句） The young man started to go back to his room when he stopped started to的意思 18题补全单词THE CHILD WAS SO SCARED THAT HE STARTED TO18题补全单词THE CHILD WAS SO SCARED THAT HE STARTED TO C____ he first started a___ when He started off into space he started to learn English 对five years ago》划线对划线部分提问 After he d___ them a beautiful house,the workers started to built it He thought they were real robbers and started to __________（喊救命）. he started to work in this factory in 2007.（改为同义句） The young man speaks very good English,but a______ he started to learn English only 一年. 将下面错乱的单词连成句子he a factory to started work in Shang joke was five when he started to play table tennis.对five提问