I assure you of its quality.

我向你保证它的品质。

You'd have a better chance of catching the train if you took a bus to the station instead of walking.

如果你不是步行而是乘公共汽车的话，那你就比较有可能赶上火车。

I think exactly the same way.

我完全同意。

If she could help you, she would help you.

如果她能帮你，她一定会的。[虚拟语气]

I enjoyed the movie very much. I wish I had read the book from which it was made.

电影不错，我希望我读过原著。[wish + 主语 = 过去完成时 = 愿望之事在wish以前发生。]

Being happy in my work is most important to me.

工作中开心最重要。

Yes, she did.

是的， 她说了。

Brown was friendly and easy-going.

布朗待人友善。