1.come undone (鞋帶等）松了,線縫等）開了
例句：Lace your boots firmly or the lace will come undone.
把你的靴子系緊，不然鞋帶會松開。
2.come up 出現,開始；(為了繁談等）走上 前來
例句：A beggar came up to us and ask for money.
一個乞丐走過來向我們要錢。
3.come up against 突然地(或意外地）碰到(困難、反對等）
例句：We came up against a great deal of resistance in dealing with the case.
我們在處理該案件時碰到了很多阻力。
4.come up in the world 發跡，興盛，飛黃騰達
例句：The Whites have come up in the world.
懷特一家已飛黃騰達起來。
5.come up with (針對問題、挑戰等）提出, 想出
例句：I came up with them as they were rounding the corner.
他們正在拐彎時，我趕上了他們。
6.come upon 碰上，偶然遇到
例句：I tell you the truth, all this will come upon this generation.
我實在告訴你們，這一切的罪，都要歸到這世代了。