对...忠实的英文：
be faithful to

参考例句：

As faithful as a dog
像狗一样忠实

a faithful friend
一位忠实的朋友

We are your staunch supporters.
我们是你忠实的支持者。

One of his virtues is faithfulness.
他的长处之一是忠实。

He had been Henry's mentor for years, but he was also a big fan of mine.
多年来，他一直是亨利忠实的顾问，但他也是我的一个狂慕者。

Unsuspecting fans of madonna would until recently have got a shock if they had linked to www.madonna.com
美国歌星麦当娜的忠实追随者们如果最近上过www.madonna.com这个网站的话，肯定大吃一惊。

Be faithful to;be loyal to
对..忠实

Faithful to the end/last
忠实到底

Yours faithfully
你的忠实的

She‘s a sincere friend.
她是位忠实的朋友。

faithful是什么意思：
adj. 忠实的，忠诚的；如实的；正确的
n. 信徒

As faithful as a dog.
像狗一般的忠诚。

"in faith (=by my faith, upon my faith)"
实在!说实话!说真的!的确!

Faith, which does not doubt is a dead faith.
没有怀疑的信念是无生命的信念。

Love asks faith, and faith asks firmness.
爱情要求忠诚，忠诚要求坚定。

Faith is stronger than reason.
宗教信仰比推理劝说更具威力.