例如：I don't know how I should solve this problem.这句从句里I是主语，should solve是谓语，this problem是宾语，how是方式状语。
具体用法
How do you like the film?你有多喜欢这电影？
How does he study hard?他学习有多努力
How busy are you?你有多忙？
How beautiful is she？她有多漂亮？。
对天气的询问通常用以下这两种方式：
What is the weather/climate like?后可加时间或地点等状语。
How is the weather/climate？后可加时间或地点等状语。