新概念第一册89课知识点.docVIP

89课知识点 单词讲解 1.believe 相信，认为 1).believe+that从句（宾语从句） eg.He believes that nothing is impossible. 2).believe in sth相信某物的存在 eg.Do you believe in ghosts? 3)believe in sb相信某人，相信某人的存在 eg.Do you believe in God? 4)believe it or not 信不信你(常用语口语) 5）make believe 假装，装作 2.may 情态动词（用于请求许可）可以 eg.May I sit down? May I use you phone？ 问句的回答通常用Certainly\Yes ,please\Why not ?\Sure表示同意，许可。不同意则用No I’m sorry\I’m afraid you not等3.how long 多少 多长（时间的长短） ----How long has he worked here? 物体的长度 How long is this desk ? 与how 相关的特殊疑问词 How often 多久，经常（问频度） eg.----How often do you go swimming? ----I go swimming three times a week . How soon 多久 eg.How soon will you come back? 4.why 为什么(其问句是由because引导的原因状语从句) 5.because 因为（连词，引导原因状语从句） because of 因为（其后跟名词，代词等作宾语,不接从句） 6.sell卖，出售 sell sth to sb=sell sb sth He sold his house to a banker = 7.比较cost 和spend cost 1.v花费（金额，费用）其主语经常为物 eg.This jacket costs 200 dollars. cost sb+n 花了某人多少钱 This pen costs me 2 yuan. 使某人付出（时间，劳力，生命等） Careless driving will cost you your life . 2.n.代价，价格，费用，经费 The cost of this desk is $55. the cost of living 生活费用 spend 花费，其主语通常为人 spend money on…..在…..花钱 I spent $20 on this book spend time in doing …..在…花时间 He spends most of his time in traveling 8.比较worth worthy worthwhile 1)worth 值….多少钱 be worth +n(当名次为金钱时，表示…值….) be worth doing sth 值得做某事 eg.Her suggestion is worth considering. 2)worthy adj 值得…的 be worthy of +n./doing….值得… The question is worthy of being discussed be worthy to do 值得做…. The method is worthy to be tried 3)worthwhile adj.值得花费时间，金钱的 a worthwhile task值得做的工作 重点语法 1.For和since 在现在完成时中的运用 for表示经历（一段时间），而since表示自从….以来，常见结构为：for+一段时间 since+一段时间+ago/since+一个时间点/since+从句 eg.He has lived here for 20 years. He has lived here since 1982. He has lived here since 20 years ago. 2)除了for, since以外，常和现在完成时的连用的副词还有already，ever，never，just，yet，in the past few years，over the last thirty years，so far up to now ,since 1980等. eg.Most colleague students have learned English for more than 6 years许多大学生已经学英语六年多了 Gre