就会做到的英文

阁下的的也算正确,不过不出彩。参考我的:Where there a will,there is a way.Nothing is impossible to a willing heart.Nothing is difficult if you put your heart into it.

you can surely do this if you have dreams

i will keep my promise.

As long as you want to do it, nothing is impossible 这样就可以了，缺少宾语。。下面一句也是不怎么正确，应该这样if you want to do it ,you can 。

if you can dream it.you can do it

上面那句不地道啊。 下面那句倒可以这样翻译。 Nothing is impossible，if you put your heart into in。世上无难事，只怕有心人。

这句话有点歧义啊，如果你要表达的是我一定会做到我说过的，可以说I will do as what I have said. 或者是 I will keep my promise. 但是如果你要表达的是 “我说过：我一定会做到”，那么应该用 I have said that I would make it.