选修1 UNIT 3 CONSERVATION 第3课时 表达能力的优化升级（Word教参）-【创新方案】2024高考英语一轮复习（新教材 新高考 北师大版）

1．without引导的含蓄条件句 (1)在without引导的虚拟结构中，如果是与过去事实相反的假设，则主句谓语动词用would/could/might＋have done；与现在事实相反的假设则用would/could/might＋do。 (2)含蓄虚拟条件句还可以用but for, otherwise, or, but等词(词组)来引导。 (3)otherwise, or构成的含蓄虚拟语气结构为“真实情况＋otherwise/or＋虚拟情况”；而but构成的含蓄虚拟语气结构为“虚拟情况＋but＋真实情况”。 先学通(通过句子变换把握句式特点) ①I would have failed in the examination if you hadn't helped me. →I would have failed in the examination without_your_help. ②If my parents hadn't lent me the money, I couldn't have afforded the trip. →My parents lent me the money.Otherwise,_I_couldn't_have_afforded_the_trip. ③If you hadn't just rescued him in time, the boy would have been drowned. →But_for_your_timely_rescue,_the boy would have been drowned. 再写美(通过句子仿写做到运用自如) ④如果不是因为下雨，这项工作本来可以及时完成的。 The job would_have_been_completed in time without the rain. ⑤要是没有改革开放的话，我们仍然会过穷日子。 Without_the_reform_and_opening-up,_we would still live a poor life. 2．keep＋宾语＋宾语补足语 　“keep＋宾语＋宾语补足语”结构有以下几种形式： (1)keep＋sb./sth.＋形容词/副词 (2)keep＋sb./sth.＋介词短语 (3)keep＋sb./sth.＋doing (表示动作持续进行) (4)keep＋sb./sth.＋done (表示被动) 先学通(通过题点训练把握用法规则) 　(单句语法填空) ①They use computers to keep the traffic running (run) smoothly. ②Please remain seated and keep your seat belt fastened (fasten)． 再写美(通过句子仿写做到运用自如) ③熊猫妈妈不断地舔舐宝宝使它保持清洁。 Mother panda licked the baby constantly to keep_it_clean. ④在你离开办公室之前确保把灯关掉。 Make sure to keep_the_lights_off before you leave the office. ⑤为了更方便地联系到我们，你最好把这张卡片放在手边。 To make it easier to get in touch with us, you'd better keep_this_card_at_hand. 3．whether 引导的从句 (1)whether引导名词性从句时，表示“是否”。if表示“是否”时，通常只能引导宾语从句，但if引导的宾语从句不能位于介词之后。 (2)whether ...or ...既可以引导让步状语从句，又可以引导名词性从句，意为“不管是……还是……，不论……还是……”。 (3)whether or not意为“无论，是否”。 (4)whether to do sth.(or not)意为“是否做某事”，为“引导词＋to do”形式，常用来作动词宾语。 先学通(通过句子变换把握句式特点) ①He's always tired whether he is working or he is relaxing.(用状语从句的省略升级) →He's always tired whether_working_or_relaxing. ②It's up to you to decide whether we will get aboard the glass-bottomed walkway. →It's up to you to decide whether_to_get_aboard_the_gla