He works as a bank clerk.为什么要加“as”?去掉“as”可以吗?

He works as a bank clerk.为什么要加“as”?去掉“as”可以吗? as,he,a,the,street,in,bank,works,clerk,the,across连词成句 He works in a bank的同义句 翻译：He works as a freelance artist. he works in a bank 划线部分提问in a bank 划线部分 He walked as far as＿＿＿the river bank.A./ B.to C.for D.on 关于银行的职业 she works in bank as a t_______ He works as a w___ in a restaurant. He works for a newspaper as a writer 同义句 He works in a bank ,but his h_ is building model boats. he works as a teacher句型转换= his father works in a barber's shop ,he works as a hair s____. his father works in a barbershop,he works as a hair s____. Lu Xun is famous ( )a great writer.He is famous( ) his works . A.for,as B.as,for C.as,with She works in a bank.对in a bank提问 ________ he works hard,I didn't mind when he finishes the experiment.A.As soon as B.So long as C.As well as D.So far as He works ( ) a car factory.He works ( ) a car factory.A.on B.of C.in He first worked in the bank as a clerk,and years later he turned ( )writer .此处填什么?A theB a C 不填