我需要筆。你能借我一支嗎?

"to pull one's leg"(同某人開玩笑)是慣用語。

他是唯一能幫助你擺脫困境的人。

這是我給你的那一個嗎?

這兒有兩支鋼筆;這支給你,另一支給你妹妹。

one pron, det 1 1; one less than two; a single 1, 一（個）; 單個 I've got two brothers and one sister. 我有兩個弟弟和一個妹妹. There's only one piece of cake left. 只剩下一塊餅了. Book One, Chapter One, ie the first chapter of the first book 第一冊, 第一章 One of my friends lives in Brighton. 我有個朋友住在布賴頓. One of the girls brought her sister. 那些姑娘有一個把妹妹帶來了. 2 (a) (esp of periods of time) a particular but unspecified （尤指時間的段）某一（但非特指某時間） one day/morning/afternoon/evening/night last week 上星期的一天[一個上午/一個下午/一個晚上/一夜] One day (ie At an indefinite time in the future) you'll be glad she left you. 有朝一日你就慶幸她離開了你. One morning in June... 六月的一個早晨.... (b) (used for emphasis and always stressed 用以加強語氣, 必須重讀) a particular (person or thing) 某（人或物） The `one way to succeed is to work hard and live a healthy life. 成功的唯一途徑是勤奮及過健康的生活. No `one of you could lift that piano, ie Two or more of you would be needed. 你們一個人誰也抬不動那架鋼琴. 3 (usu fml 通常作文雅語) (used with somebody's name to show that the speaker does not know the person 用於姓名之前表示說話者不知其人) a certain(5) 某; 某個; 某位 One Tim Smith (Cf 參看 A Mr Smith) called to see you but you were out. 有個叫蒂姆?史密斯的來過電話找你, 你不在. The author of the anonymous article turned out to be one Stanley Carter. 那篇匿名文章的作者原來是個叫作斯坦利?卡特的人. 4 (used with the other, another or other(s) to show a contrast 與the other、 another或other(s)連用表示對比、 對照或區別) The two girls are so alike that strangers find it difficult to tell (the) one from the other. 那兩個女孩兒像極了, 外人難以分清她們誰是誰. I see you add the egg before the milk. That's `one way of doing it, ie suggesting there are other and possibly better ways. 我看見你先加雞蛋後放牛奶. 這是一種做法（言外之意, 可能有別的、 更好的做法）. I'm sorry I can't help you. For one thing (ie As a first reason) I'm in a hurry, and for another I have a bad back. 對不起, 我幫不了忙. 一來我有急事, 二來我後背有毛病. 5 the same 同一: They all went off in one direction. 他們都往同一方向走了. After the union meeting the workers were all of one mind, ie all had the same opinion. 工會開過會後, 工人們都心齊了（獲得共識）. 6 (infml 口 esp US) (used instead of a or an to emphasize the n or phrase that follows it 代替a或an以強調其後的名詞或詞組) That's one handsome guy. 那是個漂亮的小伙子. It was one hell of a match, ie a very good and exciting match. 那?quot;熱始? 7 (idm 習語) be all one to sb => all3. be at `one (with sb/sth) be in agreement (with sb/sth) （與某人[某事物]）相同, 一致 I'm at one with you/We are at one on this subject, ie Our opinions are the same. 在這個問題上我和你[我們]意見一致. get one over sb/sth (infml 口) gain an advantage over sb/sth 勝於或優於某人[某事物] They got one over us in the end by deciding to speak in German. 他們決定說德語, 終於略勝我們一籌. get sth in `one (infml 口) immediately be able to give an explanation, solve a problem, etc 馬上能作出解釋、 解決問題等 `We have to attract younger customers.' `Exactly, you've got it in one!' ｀我們得設法吸引年輕顧客.＇｀太對了, 你真是一語中的!＇ I, you, etc/sb for `one certainly I, you, etc/sb 我[你/某人]就是 I for one have no doubt that he's lying. 起碼我就深信不疑他撒謊. Lots of people would like to come -- your mother...

*[w?n]n. 一(個)pron. 一, 任何人num. 一, 一個a. 一致的, 完整的相關詞組: one day one night one morning pull a fast one on sb be at one for one in one in the year one lay one on sb never a one one after another one after the other one and all one and only one and the same one another one by one one of these days one of these fine days one or other one or two one too many become one be one-up on sb