will后能不能加副词

可以,
will + 副词 的句型很常见,
但是通常副词后面另有动词原型
下面提供这两个用法：
I will happily go with you to the concert.
Mary:Will you go with me to the concert,Bill?
Bill:Of course I will,happily.
另外,你的句子看似有错,或者是
the next hit will definitely be harder
the next time it will definitely be harder
我是加拿大人,前英语老师.