高考英语3500词这本书几个月可以背玩啊？一天背15个小时

建议你不要这样干，你还是每天背50个单词和它的衍生词，一天背15个小时没什么效率。

背基本的单词就可以了
照你这样的情况 是背不完的`
而且 优秀高考生也不会有这个多的词汇量.

I suggest you begin to learn english with sentence, do not recite separate word only.
Such as, Love and Engjoy, you can not identify their meaning if you just stare at the separate word. The sentence can help you to identy their meaning, such as, I love you. I am enjoying my delicious dinner.
I hope it is helpful for you.