介绍:
between
between you and me; (strictly) between ourselves
e.g.: It was what I would call, between you and me, a bribe.
Strictly between the two of us, Sam will be sacked fairly soon.
Between you and me, I think our boss is really stupid.
big
That's (very) big of you.
e.g.: It's big of him to have lent me $5, you know, it might just have saved my life!
A: You can use my car this evening!
B: Thank you, that's very big of you.
bird
a little bird told me
e.g.: A little bird told me that they may be getting married soon. A: How did you find out I had a new girlfriend?
B: Ah, a little bird told me!
