關於compete後面接with/against/for的

1. to compete for Sth 為求某種目的利益 (例：金錢、頭銜、市場占有率、工作、愛等)而競爭 So many ladies were there to compete for that title. (為頭銜)Many jobless people standing in a long line to compete for the same job. (為工作)Children may compete for the love of their parents and teachers. (為愛) 2. to compete with Sth (為了上述目的必需) 和其他人、機構、事物等「共同」競爭，但沒有刻意指出那些對象的名稱。
His humble income can’t compete with salaries in private industry. (和私人機構的薪資)It’s getting hard to compete with other lower-wage countries. (和工資低的國家)They found themselves competing with foreign companies for market share. (和外商)There are a bunch of ways we can compete with the Yankees and Phillies. (和這兩隊)In one factory that makes one-third of all the socks in the world. I mean, America doesn't want to make socks anymore. We don't want to compete with that. We want to compete with the products. (和產品) 就算有指名道姓時，也仍可用with (共同)，而不一定要用against，以降低敵意。例： Apple can't compete with Android? It doesn't need to. (Apple 和Android)The Xinhua News Agency is launching a 24-hour global English-language television news service, headquartered in New York City 's Times Square , to compete with CNN and the BBC. (新華社和CNN，BBC) 3. to compete against 因against這個介系詞可指雙方是處於「對抗、不和」的狀況，所以比with (共同；一齊)顯得有「敵意」：
a. 有明確特定的對象 (人；機構等) (顯得較有敵意)
They compete against each other.
這句也可說成
They compete with each other.
前者較強調「對抗的敵意」，後者只在說明「共同競爭」
The first-run winners will compete against Chris Paul. (和Chris Paul抗爭)You're going to compete against your father? (和父親抗爭)It's like a mom and pop grocery store trying to compete against Wal-Mart. It's very tough. (和全球最大百貨商場龍頭Wal-Mart抗爭)Microsoft' s failed in an attempt to acquire Yahoo to compete against Google. (和Google抗爭)In order push yourself to do your best, you compete against yourself and not others. (和你自己抗爭) b. 有明確特定的對象 (事物狀況) (顯得較有敵意) It will be very tough for GM to compete against world class competition. (和世界級水準抗爭)

they all have different meanings.

compete with xxx - xxx是你在對抗時所會用到的人或物
compete against xxx - xxx是你所要對抗的對象
compete for xxx - xxx是你對抗的目的，ie, 為了xxx去對抗

I compete against other contestants with my unique talent for the $1 million dollar prize.

2011-11-01 07:19:31 補充：
如果把以上句子拆開來，會得到以下結果：

* I compete against other contestants.
"other contestants"(其他參賽者)是我所要對抗的對象

* I compete with my unique talent.
"unique talent"是我對抗時所用的招數

* I compete for the $1 million dollar prize.
"$1m dollar prize"是我當初搞對抗的目標/目的/原因