also girl-friend, by 1859 as "a woman's female friend in youth," from girl + friend (n.). As a man's sweetheart, by 1922. She-friend was used 17c. in the same set of senses, of the mistress of a man and of a woman who is a close friend of another.
权威例句
1. He had been behaving very meanly to his girlfriend.
他对女朋友一直非常刻薄。
2. He's constantly on the phone to his girlfriend being soppy.
他总是卿卿我我地跟女朋友煲电话粥。
3. The boy didn't have a girlfriend, much less a wife.
这小伙子连女朋友都没有,更不用提老婆了。
4. His girlfriend had gone into the witness box and taken the oath.
他的女朋友进入证人席并立了誓。
5. He had been going out with his girlfriend for seven months.