They need to work hard at their lessons怎么讲这句话改为一般疑问句?

They need to work hard at their lessons怎么讲这句话改为一般疑问句? You had better work hard at your lessons.改为一般疑问句 his brother works hard at his lessons.(改为一般疑问句) They need to study hard at school.(做两句否定句,两句一般疑问句） We shall work hard at English.(改为一般疑问句） 改成一般疑问句They do their work at home the student work hard at their lessons.的意思 they should put their work first .(改为一般疑问句) ＿＿they ＿＿their w To work hard at our lessons is possible for us改为同义句 work hard at your lessons(改为陈述句） They usually ride bikes to work.(改为一般疑问句) they had to work for the boss day and night.改为一般疑问句怎么改?