friendly的名词是friend，意为：朋友;友人;赞助者;支持者;自己人;同志;同伙;同盟者。
例句：My best friend has been like a sister to me. 我最要好的一个朋友待我亲如姐妹。
know we're friends, but this is strictly business.
我知道我们是朋友，但这完全是公务。
He showed great discrimination in his choice of friends.
他在择友方面颇具慧眼。
We were friends and colleagues for more than 20 years.
20多年来我们既是朋友又是同事。
In times of crisis I know which friends I can turn to.
在危难关头我知道能投靠哪些朋友。
She needs more friends of her own age.
她需要更多的同龄朋友。
I really value him as a friend.
我真的把他视为好朋友。
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