propose to sb

向某人求婚

Would you like to share the rest of life with me?

Do you want to grow old with me together?

 你愿意和我共度余生吗？

get down on one knee

单膝下跪

A: You know how I feel about you. I have fallen in love with you. I want to share the rest of my life with you. So I want to ask you a very important question.

你知道我对你的感觉，我已经深深地爱上了你。

我想和你共度余生，因此我想问你一个很重要的问题。

B: OK, but why are you getting down on one knee?

好吧，但是你为什么要单膝下跪呢？

A: Will you marry me?

你愿意嫁给我吗？

B: Is this an offer of marriage?

你这是在求婚吗？

A: Yes, I'm kind of serious. I want you to know that I've made this decision after a lot of thought. I am convinced that we are made for each other. 

是的，我是认真的，我想让你知道，我慎重考虑过了，咱们俩是天生的一对。

B: I know. But I'm not ready for..

我知道，可是我还没有准备好。

A: We can have a lavish wedding if you accept my proposal. I really love you and want you to be my wife.

如果你答应我的求婚，我们可以举行盛大的婚礼。

我真的很爱你，想让你成为我的妻子。

B: You're really nice. Your way does touch my heart. 

你人真的很好，你真的很让我感动。

A: So, will you marry me?

那么你愿意嫁给我吗？

B: It's not a proper time for marriage, we have only been on three dates. 

现在还不是结婚的时候，我们只约会了三次。

A: If you don't mind, I want you to  think of it for more time.

如果可以的话，我希望你再多考虑考虑。

B: I will. 

我会的。