classmate是單數(shù)還是復(fù)數(shù)

　　classmate例句分享

　　It is really nice to have such a good classmate.

　　有這么好的同學(xué)真是太好了。

　　He turned around, and I recognized him as a former classmate.

　　他轉(zhuǎn)過來，我才認(rèn)出是位老同學(xué)。

　　He is my classmate and also my best friend.

　　他是我的同班同學(xué)也是我最好的朋友。