在"He bought the watch very cheap"中cheap是副词?

在"He bought the watch very cheap"中cheap是副词? I bought the shoes cheap 为什么不用cheaply?副词修饰的不是动词吗? I found the books here are very cheap,so I bought all those he asked the girl in the shop --the watch --cheap enough The sweaters are_sale.They are very cheap. The books are very cheap 改感叹句 the book is very cheap同义句 翻译：I bought this second-hand car dirt cheap.并问：dirt cheap 在句 The meat is very cheap.对cheap进行提问：什么is the meat? All the ____(watch) in this shop are cheap The store( )many kinds of things.They are very cheap.括号中填什么? cheap 的形容词或副词的最高级是?