His job is to clean the steer.这句话中为什么clean前要加to

His job is to clean the steer.这句话中为什么clean前要加to 请问,这两句话都是不定式作表语吗?1.He is to clean the house.2.His job is to clean the house. His job is to catch t( ） my job is to make the street clean 和my job is making the street clean 为什么第一个对 His job is showing his students how to learn. He always keeps the house clean.(改为动词不定式)His job is ___ ___ the house clean. His job is to teach Chinese.和His job is teaching Chinese.两者的区别. She wanted to know 选哪 what is his job what was his job what his job is what his job was it is ____ turn ____ the room.A his ,to clean B he ,clean C his ,clean D he ,cleaning Dad is going to clean his car翻译 “What's his job?”做问句,回答可不可以是“His job is to ……”? My job is cleaning the classroom.和My job is to clean the classroom有什么区别? 连词成句:clean,talk,to,job,not,is,my,to Her job is to clean the hall和Her job is clean the hall有神魔不同啊第二句对吗 划分句子成分：His job is to train swimmers. His job is to c____ money in a bank 连词成句to feed job is his animals the His job is to (指定饮食)for patients一词