Unit 4 Growing up Grammar--Task知识点详解 2023-2024学年牛津译林版英语九年级上册

Unit 4 Growing up Grammar—Task知识点详解 Grammar 1. 时间状语从句 连词 例句 说明 when When I came into the room, he was writing a letter. when指的是“某一具体的时间”,引导的动词既可以是短暂性动词，也可以是延续性动词。 while ①While it was raining, they went out. ②I stayed while he was away. ③All of us are working hard while he is sleeping. ①while指“在某一段时间里”，“在…期间”，有时表示主从句的轻微转折，译为：“然而” ②while引导的动作必须是持续性的，表示的一种状态。 as ①He hurried home, looking behind as he went. ②As time goes by, I like China better. ①as（译为“一边……一边”）引导持续性动作，强调主句和从句的动作同时发生； ②as译为“随着……” before ①I finished my task before I went home. ②Be a pupil before you become a teacher. 在….以前 after He arrived after the game started. after“在…之后” till/until ①We waited till(until) he came back . ②She didn’t stop working until eleven o’clock . ③Until he had passed out of sight, she stood there. ①如主句动词是持续性动作，常用肯定式，表示“直到…为止”； ②not…until…表示“直到…才…”。 主句通常用瞬间动词，这时until可用before替换。 He didn’t leave until/before I came back. 有时可用never, nothing代替not. ③如果从句放在句首表示强调，一般用until, 不用till. since Great changes have taken place in China since 1978. 主句动词为持续性的，从句动词为瞬间的。 ①如果状语从句在主句之前时一般用逗号与主句分开； ②如果从句在主句之后则不必用标点符号。 as soon as ①As soon as I arrive in Shanghai, I’ll write to you. ②My brother went out as soon as I got home. ③I'll phone you as soon as I arrive in Tonghua. as soon as 表示主句发生的动作发生在从句动作之后， 意为“一…就…”。如果主句是一般将来时，情态动词加动词原形或祈使句时，时间状语从句用一般现在时。 当主句是一般过去时，从句一般也用一般过去时，简言之：主将从现；主过从过 whenever ①Whenever he sees the book, he will think of the good memory. whenever = no matter when 无论何时 【举一反三】 1. --Mr. Smith, please teach me how to draw on the computer today. --Oh, no. _____. You have to get familiar with the keyboard first. A. It’s never too old to learn B. Think twice before you do C. Don’t be a wet blanket D. Learn to walk before you run 2. —When will she go home? —She ______ home ___ she finishes her homework. A. won’t go ; before, B. goes; before C. won’t go; until D. go; after 3. --Could you tell me _______? -- Sorr