高中英语 Unit3 The computer the information age grammar教案(1) 冀教版必修3

用心 爱心 专心 1 Unit3Unit3 TheThe ComputerComputer andand thethe InformationInformation Age grammarAge grammar 教案教案 时时 态态 一 总述 为了便于讲解 我将英语中的时态 分为现在时和过去时 现在时包括一般现 在时 现在进行时 现在完成时 姑且把将来时也归入此类 过去时包括 一般过去时 过 去进行时 过去将来时 过去完成时 一般来说 时态对应是指现在时对应现在时 过去时 对应过去时 当然 特殊语境需要特别分析 二 时态对应主要包括以下的典型用法 1 下列情况下 如果主句是将来时 用 will shall can must 或者主句是祈使句 从句 用一般现在时 1 在 if unless even if 引导的条件状语从句中 如 You will be punished unless you go though with the work I won t attend the party even if I am invited 2 在 when before until as soon as the moment once 引导的时间状语从句中 如 I ll let you know the moment I get timely information Once you realize your mistake you ll regret for what you ve done 3 在 no matter what no matter who no matter when no matter where no matter how no matter which 或者 whatever whoever whenever wherever however whichever 引 导的让步状语从句中 如 I ll believe whatever you have said However difficult the problem is we ll overcome it Wherever you go I ll follow you We can help whoever gets in trouble 2 在 祈使句 and or 句子 的模式中 and or 后的句子常用将来时态 如 Put on the coat or you ll catch a cold Work hard and you ll make rapid progress 3 注意 used to would 区别 他们都表示过去常常 但 would 常和时间连用 而 used to 不可以 如 When I was a boy I would swim every day 用心 爱心 专心 2 4 be about to do 如果用在简单句中 常用一般现在时 如果用在复合句中 常和 when 引 导的过去时的从句连用 如 I am about to leave when i was about to fall asleep when someone knocked the door 但要注意 be about to do 不和具体的时间连用 我们不可以说 We are about to leave this afternoon 应说 we are about to leave 或者说 we will be leaving this afternoon 5 语境中的过去时常表示 刚刚 刚才 之意 暗示现在已经不是这样 如 Sorry I didn t know you were here 6 表示愿望 打算一类的词 如 hope expect mean intend want think suppose want 等 其过去完成时表示过去未曾实现的愿望或意图 如 Why haven t you attended the party I had meat to but I was busy 7 在 It This be the first second time that 句中 如果 be 为一般现在时 that 后 的句子一般用现在完成时或一般现在时 如果 be 为一般过去时 that 后的句子为过去完 成时 如 This is the first time that I have met the famous scientist This is the first time that he gets involved in the tournament 8 在 It be 段时间 since 从句中 如果 be 表现为 is 或 has been 形式 since 从句用 过去时 如果 be 表现为 was 或 had been 从句用过去完成时 如 It is 3 years since he has taught in this university 9 在 hardly when no sooner than 结构中 hardly no sooner 所在的主句用 过去完成时 when than 所在的从句用一般过去时 而且 如果 hardly no sooner 放在句 首 主句部分要部分到装 从句结构不变 如 I had hardly recognized him when he turned up Hardly had I recognized him when he turned up No sooner had the train left than I got to the railway station 10 在 主句 before 从句 的结构中 如果主句和从句中动词先后顺序明显 主句用过去 完成时 从句用一般过去时 如果主句和从句的动作先后顺序不明显 主从句都用一般过去 时 如 用心 爱心 专心 3 The film had been on for 30 minutes before I got there He hurriedly went out before I said a word 11 在 it be 段时间 before 从句 中 如果从句是一般现在时 主句中的 动词用 will be 形式 如果从句中的动词是一般过去时 主句动词用 was 的形式 如 It will not be some time before he graduates It was 3 years before he graduated 12 在 will shall be doing 结构中 将来进行时 其后往往跟上具体的将来时间 如 The plane will be flying over the Pacific this time tomorrow morning 13 在 by 时间 的结构中 如果时间是过去时间 主句中的行为动词常为过去完成时 但如果句中的动词是状态动词 be 仍然用一般过去时 如果时间是将来时间 主句中的行为 动词用将来完成时 同样 如果句中的动词是状态动词 be 仍然用将来时 如 By the end of last year they had completed the task By last month he was 10 years old By he joined the army he had served us as a cook for 5 years By next month we will have learned Lesson 21 14 在 主语 介词 主语 的结构中 句中的动词要以第一个主语作为标准 这类介词有 with together with as well as 等 如 The teacher together with the students is going to Hongkong tomorrow The dog as well as ten sheep is going to be shipped to Qingdao 15 在 neither nor either or there be 等结构中 采用 就近原则 如 Were neither you nor he there when the accident happened Neither you nor he was there when the accident happened There is a pen and ten books on the desk There are ten books and one pen on the desk 16 注意一般过去时