he is working for a big firm as an engineer 句中的working是什么时态

he is working for a big firm as an engineer 句中的working是什么时态 he is working for a big firm as an engineer这句话的as用对没有? Tim is working for a big firm as an engineer是什么意思 英语翻译Tim is working for a big firm as an engineer蒂姆在一家大公司担任工程 he is working for a big firm? Tim is working for a big as an engineer.这句话中的as该怎么解释?求大神详解. Tim is working for a big firm.He is working for a big ( ) A and连接要时态一致 He is working for a big firm and he has already v he is working for a big firm.和he works for a big firm.有什么区别? 关于新概念英语第四课He is working for a big firm and he has ...还有一句He He is working for a big firm and he has visited a great numb 现在完成时填写： He is working for a big firm and he aleady ____(vis