1.keen on 熱衷于,對…著迷,再愛
例句：Mary is very keen on etching.
瑪麗很喜愛蝕刻藝術。
2.keep up (使）繼續下去，（使）不停，堅持，保持(使）保持良好狀態
例句：Keep up the struggle till you succeed.
繼續戰斗直到你們取得勝利。
3.keep sth. quiet (keep quiet about sth.) 將某事保密
例句：I'll brain you if you don't keep quiet.
如果你不保持安靜的話，我就敲你的腦袋。
4.keep a secret 保守秘密
例句：“Can I trust you to keep a secret?” she asks.
“我可以相信你能替我保守秘密嗎？” 她問？
5.keep abreast of (或with) 與…齊頭并進，(使）不落后于
例句：That way, you can keep abreast of emerging issues and concerns.
這樣，你就可以跟得上新問題的發生與進展。
6.keep an eye on 照看，留神，密切注意
例句：Rogers believes global surveillance for influenza outbreaks should keep an eye on Arctic ice.
羅杰斯認為，全球對流感爆發的監測應該留意北極冰河。