问题补充：
句型转换
【小题1】 I can borrow the books from the library twice a week. (就划线部分提问)
How oftenlike bestcan you borrow the books from the library?
【小题2】Which is your favorite subject ? (同义句改写)
Which subject do you How often like best?
【小题3】He seldom goes to Shanghai by train. (改为一般疑问句)。
Does gohe seldom Don’t talkto Shanghai by train?
【小题4】You can’t talk so loudly in class. (改为祈使句)。
aren’t anyso loudly in class
【小题5】 There are some boys on the playground. (改为否定句)。
There boys on the playground.
答案：
解析：
【小题1】twice a weak “一周两次”要用how often来提问
【小题2】favorite subject最喜欢的科目
【小题3】一般现在时的一般疑问句的构成
【小题4】祈使句的否定形式为Don′+动原.
【小题5】在否定句中要用any不能用some
