一、remain作为不及物动词，有两种意思，但都不能用进行时态，也没有被动语态:
remain表示“剩下”、“余下”、“遗留”,例如:
Only a few leaves remained on the tree.树上只剩下几片叶子了。
2.remain表示“留下”、“停留”、“呆在”，相当于“stay"
例如: The Smiths remained there all through the year.史密斯一家人在那里呆了整年。
二、remain作为系动词，表示“保持”、“仍然是”，“依旧是”，后接容词、名词、动词不定式、现在分词、过去分词或介词形容词短语作表语，指某人或某事物仍保持某种状态。
He remained silent. 他保持沉默。(接形容词)
It remained a secret. 这仍然是个秘密。(接名词作表语)
指某事尚待、有待于以后被处置，后面常接不定式的被动形式，表示主语是不定式的承受者。A lot of work remained to be done. 许多工作还有待完成。(接动词不定式)
He had to remain in hospital until he was better. 他不得不一直住院直到身体好些。(接介词短语作表语)
After the earthquake, very few houses remained standing.地震之后几乎没有房子还矗立着。(接现在分词作表语，表示正在进行的主动动作)
As before,he remained unmoved. 他和以往一样无动于衷。(接过去分词作表语，表示主语所处的状态或已经发生的被动动作)
三、remains作为名词，表示“遗物”、“遗址”， “剩余物”，其单复数形式相同。
The remains of an old castle still stands there silently beside the river.
古城堡的遗址如今仍默默地惪立在河岸边。
The remains of the meal has been taken away.
剩饭菜都被拿走了。
The archeologists found some remains of the Song Dynasty.
考古学家发现了一些宋代遗迹。
四、remaining是形容词，表示“剩下的”、“余下的”，修饰单个名词作定语，置于该名词之
前作前置定语，与left同义，left必须置于被修饰的名词之后作后置定语，试比较:
She returned home with the remaining 10dollars.
She returned home with the 10 dollars left.
她带着剩下的十美元回到了家。
五.Remain的一些常用词组
~+名词
remain a bachelor 还是单身remain a complete mystery 一直是个谜remain a fisherman 仍是渔民remain a little money 只剩一点点钱remain a little water只剩一点水remain a question 还是一个问题remain a shining example 永远是闪光的榜样remain good friends 仍然是好朋友remain principles保持原则remain the chief means还是主要方式
~+形容词
remain active仍然活跃remain closed 仍然未开放remain confused 迷惑不解remain constant保持不变remain expressionless毫无表情remain hungry 只好饿着remain linked 还连在一起 remain long 保持得很久 remain modest保持谦虚 remain motionless仍然不动remain prudent保持谨慎remain silent 保持沉默remain unchanged依然不变remain unconvinced仍然不相信remain unfinished 仍然未完成remain unknown依旧不详remain unsettled仍然未解决
副词+~
alwayS remain 仍然保持hardly remain 没剩下little remain没剩下