he used to be a worker 否定句

HELP问一道选择题He used to be a worker in a factory .After he beca He used to be quiet.(改为否定句） He _____ _____ to be quiet. She used to be a history teacher改为否定句 she used to be a history teacher 改为否定句 Jim used to be a policeman 变否定句 He used to be afraid to speak in front of a group同义句 He used he used to be a quiet boy 改为同义句 he is a factory worker.改否定句怎样改 He is a worker.(改为否定句,疑问句和回答) he used to be shy 一般疑问句两种,肯定回答,否定句 there used to be a hospital near here 变否定句 there ___ ___ be 求文档: There used to be a cinema here before the war怎么改成否定句?