时态专题 Ⅰ.时态 一、一般现在时 1. 表示经常的或习惯性的动作，常与表示频度的副词连用。常用的频度副词有: often, always, usually, sometimes, every day/month/year, once a week/month/year. 频度副词在句中通常放在行为动词之前，系动词、助动词之后。 People are often afraid of things they don't understand. I know my dad looks forward to his pay raise every year, and every year he is disappointed. This game was held once a year at the beginning, and now it is held twice a year ever since1957. 2. 表示现在的状态或主语具备的性格、特征和能力等。 She is tall and with long blonde hair. My brother is good at maths while I do well in chemistry. 3. 表示客观真理，客观存在，自然现象。 Light travels faster than sound. It’s known to all that the sun rises in the east and sets in the west. My mum once told me the earth travels around the sun and the moon travels around the earth. 4. 在复合句中，当主句是一般将来时，时间或条件状语从句的谓语动词只能用一般现在时来表示将来要发生的动作。即: 主将从现———主句一般将来时，从句一般现在时。 I'll only stay if you offer me more money. If anyone calls, tell them I'm not at home. 【课堂小练】 Ⅰ. Choose the best answer. 1. The traffic in Shanghai will become better if everyone _____ the traffic rules. A. will obey B. is obeying C. obey D. obeys 2. As soon as the sun _____ down, the temperature drops sharply. A. goes B. went C. will go D. had gone 3. Every year the artist _____ two months living in the mountain and painting. A. has spent B. will spend C. spends D. spent 4. The movie star is afraid that she will be recognized as she _____ at the airport. A. arrives B. arrived C. will arrive D. arrive 5. Every year the world’s top tennis players _____ to Shanghai to compete against each other. A. come B. will come C. have come D. came 二、 一般过去时 1. 表示过去某个特定时间发生的动作或存在的状态。 The buses went in opposite directions - one went south and the other went north. He left England in 1964 and never returned. 2. 表示过去的习惯性或经常发生的动作。 You always bought the same brands, usually the brands your mother bought. Alice couldn’t get up early so she was often late for school. 3. 动词过去式构成 动词的不规则变化大体分为四类： AAA类：cost, cost, cost ABA类：come, came, come ABB类：get, got, got ABC类：fall, fell, fallen 4. 与一般过去时相关的时间状语 (1)just now, yesterday (morning/afternoon/evening), last week/month/year, in 1999, two days/weeks/months/ years ago等表示过去的时间状语连用。 (2) 一般过去时表示过去经常或反复发生的动作时，常和often，always，once a week等表示频度的时间状语连用。 【课堂小练】 Ⅰ. Choose the best answer. 1. — Come and join us, Ben! — I’m afraid I can’t. I’m too busy now. If I _____ time, I would certainly go. A. had B. will have C. have had D. have 2. Sam opened the door and _____ a lovely dog outside. A. finds B. found C. has found D. will find 3. —Frank, you look worried. Anything wrong —Well, I _____ a test and I’m waiting for the result. A. will take B. took C. am taking D. Take 4. Tho ... ...
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