1. 注意以下兩個(gè)基本用法，許多其他用法和搭配均可從這兩種基礎(chǔ)引申出來：

　　(1) 表示“反對(duì)”“對(duì)著”“違反”“不利于”等。如：

　　We are all against his idea. 我們都反對(duì)他的想法。

　　He was married against his will. 他結(jié)婚是有違本意的。

　　He spoke against the new law. 他發(fā)言抨擊新法律。

　　There were 20 votes for him and 12 against him. 有20票贊成他，12票反對(duì)他。

　　(2) 表示“靠著”“頂著”“迎著”“襯著”等。如：

　　He stood with his back against the door. 他背靠門站著。

　　He hit his head against the window. 他的頭撞到了窗戶上。

　　It is difficult to see anything against this bright light. 對(duì)著這種強(qiáng)光很難看到任何東西。

　　Bright red flags flow in the wind against the blue sky. 鮮艷的紅旗映著藍(lán)天迎風(fēng)飄揚(yáng)。

　　2. 注意 against 是介詞，不是動(dòng)詞。如：

　　他靠在樹上。

　　正：He leaned against the tree.

　　誤：He against the tree.

　　這個(gè)計(jì)劃你是贊成還是反對(duì)呢?

　　正：Are you for or against the plan?

　　誤：Do you support or against the plan?

　　3. 正因?yàn)閍gainst是介詞，所以后接動(dòng)詞時(shí)要用動(dòng)名詞。如：

　　我反對(duì)在警察到達(dá)之前采取任何行動(dòng)。

　　正：I’m against doing anything till the police arrive.

　　誤：I’m against to do anything till the police arrive.

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