Unit 4 Fun with Science Grammar and composition: Subjunctive mood (II) 学案-2024-2025学年高中英语牛津译林版（2020）选修第一册

X1Unit4 Grammar Subjunctive mood(2): unreal conditionals Learning objectives： 1.To identify the use of unreal conditionals 2.To work out the rules of unreal conditionals Learning procedures: Step1 Lead in: 1．英语中的三种语气：祈使语气、陈述语气和虚拟语气 虚拟语气：表示说话人所说的话不是事实，而是一种假设、愿望、怀疑或推测 2. 什么时候用虚拟语气？ 当if引导的条件句的事情发生的可能性________，就用虚拟语气； 当if引导的条件句的事情发生的可能性________，不用虚拟语气。 要根据当事人实际情况具体分析。 Step 2 Read the story on Page 48 Q1: Why is the saying “no two snowflakes are alike” mentioned in Paragraph 1? _______________________________________________________________________ Q2: How did Wilson Bentley capture the world’s first image of a single snowflake? _______________________________________________________________________ Step 3 Task 1:Below is a story from a popular science magazine about Wilson Bentley, the "Snowflake Man" Find the sentences in the story that use the subjunctive mood and fill in the box below. The first one has been done for you. 1. It is important that he be remembered for 2.______________________________________________________________________3.______________________________________________________________________ 4.______________________________________________________________________ 5.______________________________________________________________________ Task2: Finish “Working out the rules” on Page 48. 1. In place of if-clauses in implied conditionals, we can use otherwise, without and ________. 2. We can express unreal situations after wish and would rather. 3. In it is important/necessary/essential that …, we usually use “should + bare infinitive” in the that-clause. We can leave out ________. 4. We may use the subjunctive mood in clauses introduced by as if, as though, even if and even though. Task3:Finish B1 on Page 49. 1.Without the help of scientists, we are having a limited understanding of our world. 2. If only we have a better method of studying microorganisms. 3. The ten-year-old boy acts as though he is an expert in the field of physics. 4. The Chemistry teacher suggested that we conducted our own experiments. 5. I wish there is a photograph of every snowflake that has ever fallen to the ground! Step3:虚拟语气的其他从句 1. it作形式主语的主语从句 It is a pity/ a shame that… It is strange/ natural/ necessary/ important/ impossible/ surprising that… It is desired/ suggested/ demanded/ required/ requested/ decided that… It is (high / about) time that… 从句谓语动词用should + 动词原型(should不能省)或过去式 · It has been decided that the meeting __________(put off). 2. 动词“坚持、命令、建议、要求”后的宾语从句 一个坚持，两个命令，三个建议，四个要求。 1. insist 2. order, command 3. advise, suggest, propose 4. demand, require, request, desire · I demand that John _________ (go) home at once. 3. 名词“命令、建议、要求”后的表语从句、同位语从句 order, advice, suggestion, proposal, demand, desire, request, requirement 不用考虑时态, 以上大部分从句的谓语动词都用should + 动词原型的形式, should可以省略，但依然要用动词原型。 · The suggestion is that the plan __________ (be) carried out at once. Step 4 Consolidation 1. It is necessary that the problem_________(be) settled at once. · 2. I wish I ______(be) a pilot. · 3. My mother looks after the orphan as if he _______()be her own child. · 4. I suggest that we _________(hold) a meeting tonight. · 5. If only I ___________(remember) to send you an email. · 6. We _______________(do) the work well without your help. · 7. He helped me a lot, otherwise I ____________(finish) my work on time. Homework 1. Go through the Grammar notes on Pages 94–95. 2. Finish Part B2 on Page49 学科网（北京）股份有限公司 $$