摘要： once : 用法归纳 *once可用作连词和副词. 作连词时的主要义项为:一--就,一旦,当--时候. 作副词时的主要义项为:一次,曾经,曾,根本.特别提示 : once引导的状语从句中.要用一般现在时表示将来的动作. any fear, he . 一旦你表现出胆怯.他就会进攻你. Once , this dictionary will be very popular. 一旦付印.这本词典会很受欢迎. I .我去过北京一次. He , but they are no longer friends. 他曾经与她熟识,但现在他们之间已没有友情. 相关归纳 :(1)all at once (2)at once (3)once more(=once again) (4)once or twice (5)once in a while (6)once upon a time (7)Once bitten, twice shy. a. she lost her temper. b. I can’t do everything -you’ll have to be patient. c. Come here ! d. Let me hear just . e. I don’t know her well, I’ve only met her . ●重点短语
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下列词汇为本单元出现的考纲词汇的派生词。填填看，掌握了它们的用法了吗？
1．If you say or do something ________, you say or do it with the intention of amusing someone rather with any serious meaning or intention．
2．Justice will triumph over ________．
3．The campaign is intended to ________ public awareness of the disease．
4．The little boy held ________ his mother's hand when he saw a snake in the yard．
5．I ________ believe that we must act at once．
6．The ________ is an official who governs a country or part of a country that is ruled by another state．
7．The US has represented itself as the ________ of democracy．
8．Chocolate is ________ for a lot of people．
9．Xishi was a woman of ________ beauty at that time．