I've been thinking about you lately.

我最近一直在想着你。

That's what it is.

的确是如此。

Conversation full of wit.

情趣横溢的谈话。

She is giving me piano lessons in exchange for her English classes.

我教她英语，她教我弹钢琴。

I know all the ins and outs of the business.

我重新夺得关于这件事所有的详情。

My feeling is that you ought to stay home tonight.

我觉得今晚你应该呆在家里。