I must go now, or I'll miss my train.

我得马上走了，否则我就赶不上火车了。

I know now. I must go now.

我现在知道了，我必须现在走。

Matte : I must go now.

马特：我必须走了。

I must go now, ie I feel obliged to go.

我现在得走了, 即我觉得有此必要.

Excuse me, Mr. Yan. I must go now.

对不起, 严先生, 我现在就得走.

I must go now, says he to John Wyse .

现在我得走啦，他对约翰。

M sorry, sir. I must go now. Nice talking with you.

很抱歉，先生，我必须走了。和您谈话真令人愉快。

I don't want to take up too much of your time. I must go now.

我不想占用你更多的时间，现在我该走了。

I must go now, my darling. Our children are waiting outside. They want to say goodbye to you.

亲爱的，我应该走了。孩子们都等在外面，他们要和你道别。