牛津上海版八年级第一学期8A时态专题专项讲解及练习教案

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