I believe in you、I trust you：我信任你；I believe you：我相信你；I have faith in you：我对你有信心；I can count on you：我可以指望你；I can back you：我能指望你。
相关例句：
1、I trust you completely，he said.
“我完全信任你。”他说。
2、If you exaggerate,people will no longer believe you.
如果你说话虚夸，人们便不会相信你了。
3、I saw her actions as a betrayal of my trust.
我认为她的所作所为辜负了我的信任。
4、Believe me,she's not right for you.
相信我她不适合你。
5、If you don't believe me,go and see for yourself!
要是不信我说的，你自己去看看！
