一开始我就知道你能行, 一开始怎么说?

一开始(from the very beginning) , 马上(immediately)—-(right) off the bat 

e.g. Right off the bat, I could tell he was nervous. 一开始我就能看出来他很紧张。

e.g. Right off the bat, I could tell you two were going to get along. 一开始我就能看出来你们两个能处得来.

e.g. We knew right off the bat that the project would be a success. 我一开始我就知道这个项目肯定能成.

常见结构: 

1) (Right off the bat) , + sentence

2) I knew / I noticed / I could tell right off the bat…