我會想你的。
I'll miss you. *miss “想，想念”。
I'll miss you. (我會想你的。)
I'll miss you, too. (我也會想你的。)
I'm gonna miss you. *gonna 是going to...的縮略形式，是比較隨便的表達(dá)方式。

我真希望能和你在一起。
I wish I could go with you.
I wish I could go with you. (我真希望能和你在一起。)
So do I. (我也是。)

請代我向你的家人問好。
Please give my regards to your family.
Please give my regards to your family. (請代我向你的家人問好。)
I will. They asked me how you were doing. (我一定帶到。我的家人也問過你的情況。)

你一定回來啊!
You must come back.

有空給我打電話。
Give me a call sometime.
Call me sometime.

我們什么時候再聚吧。
Let's get together again sometime.
Thank you. I enjoyed it very much. (謝謝，我真是太高興了。)
Let's get together again sometime. (我們什么時候再聚吧。)

請給我寫信。
Please write me (a letter).

我會給你寫信的。
I'll write you (a letter).

讓我們保持聯(lián)系。
Let's keep in touch. *keep in touch with... “和……保持聯(lián)系”、“保持接觸”。
Let's keep in touch. (讓我們保持聯(lián)系。)
Will do. (好的。)
Let's keep in touch with each other. *each other “互相”。

別忘了寫信。
Don't forget to write.
Don't forget to write. (別忘了寫信。)
I won't. (忘不了。)