you should speak english in class 改为同义句 同义句是问句.

You should speak English in class 你该在教室里说英语= Why don't you speak English in class = Why not speak English in class 为什么不在教室里说英语呢?“为什么不在教室里说英语呢”这句话其实言外之意就是“你该在教室里说英语”