I support you.
我支持你。
I'm behind you.
我支持你。
I"ll stand by you.
我会帮助你。
I'll back you.
我支持你。
I stand up for you.
我支持你。
I am altogether on your side.
在这个问题上我完全支持你。
I side with you.
我支持你。
You have my wholehearted support.
我全心全意支持你。
I can
assure you of my full support for you.
我可以向你保证全力支持你。