Don't worry.I'll be able to___(help) you tomorrow.

Don't worry.I'll be able to___(help) you tomorrow.
Don't worry.I'll be able to___(help) you tomorrow.

Don't worry.I'll be able to___(help) you tomorrow.
help
因为be able to do是固定搭配
有能力做什么
翻译一下就是：别着急,我明天将尽力帮助你.

be able to do sth. 用原型 help

help to后面是接动词原形的

就填help，be able to 后接原型。

help
词组be able to do sth.的含义是“能够做某事”，因此此处迎用help的动词原形。