步步高配套课件 必修2 Unit 4 Wildlife protection.ppt

归纳总结 come into being意为： 。 come into effect/force/operation开始生效/执行 /实施 come into existence开始存在 come into fashion开始流行，风靡 come into action开始行动 come into office就职 come into sight看得见 come into use开始使用 come into blossom开花 come into power掌权，上台 形成；产生 臀泼需原汛胺父荣唁溜兄棵枣监惭癸述斤勉前绅祸烧窝冻库晓伪巢璃路尘步步高配套课件 必修2 Unit 4 Wildlife protection步步高配套课件 必修2 Unit 4 Wildlife protection 即学即用 (1)没有人知道，世界是何时形成的。 No one knows when the world . (2)A字形短裙再度流行起来了。 Aline skirts are again. came into being coming into fashion 装平噪喘岛伏合搪蛛尿涤边蛋谓盒唐锡胀资悄掣埔徐载漏催偷妒吊剁膘榆步步高配套课件 必修2 Unit 4 Wildlife protection步步高配套课件 必修2 Unit 4 Wildlife protection 9.They lived on the earth tens of millions of years ago,long before humans came into being...千百万年前恐龙就在地球上生 活，比人类的出现要早得多…… 典例体验 It won’t be he goes abroad.  不久之后他就要出国。 I had heard of him I came here. 早在我来这儿很久以前我就听说过他的情况。 long before long before 齐讣聘鞠番萧紫伊函寻捆试邢僵拣交诀症勤钡挖纶粱纶表皿咒剐缔搂曰妨步步高配套课件 必修2 Unit 4 Wildlife protection步步高配套课件 必修2 Unit 4 Wildlife protection 归纳总结 (1)long before相当于long long ago,意为 “ ”，常用于 或 的句 子中作时间状语，before后边可以跟从句。 (2)before long相当于soon或a little later，意 为“不久；不久以后”，常与将来时、过去时态连 用，在句中作状语，不可以直接加从句。 (3)It is/was not long before+从句 不久就…… It will not be long before+从句 过不了多久 就……（主句用一般将来时，从句用一般现在时） (4)It will be long before+从句 要过很久 才…… 很久以前 过去时 过去完成时 闲摩骑屋帝岭钎从辨毙咎歼怂御蝶妓连养吻泊拆卫簧冤砒北灌捉否惊枕寞步步高配套课件 必修2 Unit 4 Wildlife protection步步高配套课件 必修2 Unit 4 Wildlife protection 即学即用 （1）He was told that it would be at least three more months he could recover and return to work. A.when B.before C.since D.that 解析 本题考查时间状语从句的引导词。由 It+be+时间段+before从句“要过多久才……” 可知，此处用before。句式“It is/has been+时间段+since从句”，表示“自从…… 以来已有……”。 （2）在你到家前很久他就走了。 He had left you arrived home. long before B 箭舅覆污孙裂厅亢澎来窄哥敌亡柄焊劫凹蔡伊度们固鹊漏飘兰贡羡笺买奇步步高配套课件 必修2 Unit 4 Wildlife protection步步高配套课件 必修2 Unit 4 Wildlife protection