(一).I'll give you the benefit of the doubt.從好的方面想想。/權且相信。
This means I'll trust what you say." The speaker doesn't know if someone is being honest, but he has decided to trust him anyway.

原音重現：

A: I promise that I'll pay the money I owe you tomorrow.
我明天一定還你錢。
B: I'll give you the benefit of the doubt. But you'd better bring it tomorrow.
暫時相信你，你最好明天就還錢。

美劇表達：
I'm willing to give you the benefit of the doubt and say thank you.
從好的方面想 想，我應該謝謝你。
Why can't you give me the benefit of the doubt that maybe sometimes I'm on your side?
為什么你就不能相信我站在你這一邊呢？

(二).I'll be there for you.有我呢。/我支持你。
This is a way to say "I'll always help you." It indicates the speaker feels a strong responsibility for someone.
Just be there for her.站在她這邊。

原音重現：

A: I'll be there for you when you have hard times.
在你苦難的時候我會支持你的。
B: That's good. I need a friend like you.
太好了，我就需要你這樣的朋友。

美劇表達：
I'll always be there for you, as a friend and as your brother.
我會一直陪在你身邊，就像是朋友和兄弟。
I need to know you'll be there for me.
我需要你一直陪在我身邊。