连词用法归纳一、概说连词是一种虚词，不单独用作句子成分。可分为并列连词和从属连词。二、并列连词的用法1. 表转折关系 : but, yet, while 等。注意： (1) but 的特殊含义：① Excuse me, but I don't think that's quite true. “但是”，用于道歉.② Not you but I am to blame. not ... but ... “不是 ...而是 ...”③ She knows no one but you. “除了，只”，多用于否定句④ He was the last but one to arrive. “倒数第二个”⑤ You can't help but respect them. “不得不”(2)but 不能与 although 连用，而 yet 可以。(3) but 与 however 的区别。 however 视为副词，位置灵活，逗号之前。2. 表因果关系 : for, so 等。如：注意：①for 的 从句不能位于原因之前。② for 不能用于回答问题。③ for 不能位于 not, but 或任何连词之后④ because 不能和 so 连用。3. 表并列关系 : and , or , either ⋯or, neither ⋯nor, not only ⋯but (also), both ⋯and, as well as, when(=and just at this time 就在这时 )等。注意 and 用法：祈使句+ and注意 or 用法 : ① Hurry up, or you'll be late for school. “否则”② He must be joking, or else he's mad. “要不然就”③ He was not clever or good -looking. 用于否定句，代替and④ 习惯用语： more or less “或多或少”；one or two “一两个”等【即时练习】① Someone borrowed my pen, but I don't remember who. ② The child had a bad cough, so his mother took him to the doctor. ③ The weather is mild today; it is neither hot nor cold. ④ Both New York and London have traffic problems. ⑤ The work is more or less finished.⑥ Dress warmly, or else you'll catch cold.⑦ Later, however, he changed his mind.⑧ He eats nothing but hamburgers.⑨ Work hard and you'll pass the examinations ⑩ People who are either under age or over age may not join the army.三、从属连词的用法(一) 时间状语从句1、表示“当⋯时候”：when, while, as, whenever 。注意 ① when 和 as...
