UNIT 3 Section Ⅱ Using language(教用Word)-【优学精讲】2025-2026学年高中英语选择性必修第四册（外研版）

Section Ⅱ　Using language

复习：状语从句

　　When the sun sets①， the city lights sparkle like stars，as if they were competing with the night sky②. If you visit this place③， you’ll understand why people call it magical. Tourists come here so that they can witness its beauty firsthand④. The streets are lively wherever you go⑤， filled with music and laughter. Because the locals are so welcoming⑥， visitors always feel at home. The food is so delicious that you’ll want to try everything⑦. Although it’s crowded⑧， the atmosphere remains joyful. The river flows more smoothly than you would expect⑨， adding to the charm.

句①至句⑨均为状语从句。其中，句①为时间状语从句；句②为方式状语从句；句③为条件状语从句；句④为目的状语从句；句⑤为地点状语从句；句⑥为原因状语从句；句⑦为结果状语从句；句⑧为让步状语从句；句⑨为比较状语从句。

——运用“形式—意义—使用”相结合的三维动态语法观

一、时间状语从句

【先感悟】

①Metals expand when they are heated.

②While I was reading， he came in.

③The students sang as they walked.

④It was three days before he came back.

⑤It’s two years since we arrived here.

⑥Directly you feel any pains， you must see a doctor.

⑦Not until he explained it did I understand.

⑧By the time you return， we will have finished.

【会发现】

①when 引导的时间状语从句中，谓语动词可延续或非延续，主从句动作可　同时　或先后发生；

②while 引导的时间状语从句中，谓语动词为　延续性　动作，强调与主句动作同时发生；

③as 引导的时间状语从句中，谓语动词为　延续性　动作，强调主从句动作相伴发生；

④before 引导的时间状语从句用于“It was＋时间段＋before ...”句式，表示“　过了……（时间）才……　”；

⑤since 引导的时间状语从句用于“It is/has been＋一段时间＋since ...”句式，从句用　一般过去时　；

⑥directly 表示“　一……就……　”，相当于 as soon as；

⑦not until 位于句首时，主句需　部分倒装　；

⑧by the time 引导的时间状语从句中，用一般现在时代替一般将来时，主句用　将来完成时　。

【善归纳】

1.when， while与as引导的时间状语从句

2.before与since引导的时间状语从句

名师点津

since引导的从句如果用非延续性动词，所表示的是自从句谓语动作算起；若用延续性动词或状态动词，所表示的就是自动作或状态的完成或结束时算起。

3.表示“一……就……”的表达

4.until与till引导的时间状语从句

名师点津

until/till用于肯定句时，主句的谓语动词是延续性动词，用于否定句时，主句的谓语动词是非延续性动词。

5.其他时间状语连词

【运用练】　单句语法填空

①　When　 I first dated Steve， I learned he had a dog， Molly， and a cat， Flora.

②　When/While/As　 I was waiting at the bus stop， I noticed a police car in front of the market.

③The islanders hadn’t got well prepared 　before　 they were required to relocate to a nearby island.In fact， it is only two or three years 　since　 some islanders moved here.

④Hardly had he collected the papers on his desk 　when　 the door burst open.

⑤“You can’t have this football back 　until　 you promise not to kick it at my cat again，” the old man said firmly.

二、地点状语从句和条件状语从句