89 课知识点一． 单词讲解1.believe 信任，认为1).believe+that 从句（宾语从句）eg.He believes that nothing is impossible.2).believe in sth 信任某物的存在eg.Do you believe in ghosts?3)believe in sb 信任某人，信任某人的存在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 表达批准，许可。不批准则用 No I’m sorry\I’m afraid you not 等3.how long 多少1） 多长（时间的长短）----How long has he worked here?2） 物体的长度3） How long is this desk ?4） 与 how 相关的特别疑问词How often 多久，常常（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 引导的因素状语从句)5.because 由于（连词，引导因素状语从句）because of 由于（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 sthHe sold his house to a banker = 7.比较 cost 和 spendcost 1.v 花费（金额，费用）其主语常常为物eg.This jacket costs 200 dollars.cost sb+n1） 花了某人多少钱This pen costs me 2 yuan. 2） 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 traveling8.比较 worth worthy worthwhile1)worth 值….多少钱be worth +n(当名次为金钱时，表达…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 discussedbe worthy to do 值得做….The method is worthy to be tried3)worthwhile adj.值得花费时...
