一般现在时、一般过去时、一般将来时

一般现在时、一般过去时、一般将来时

教学内容 知识点一：一般现在时 【知识梳理】 (1)一般现在时的基本结构和变化 1.一般现在时的结构 ①be动词：主语+be(am, is, are)+其它。 e.g. I am a boy.我是一个男孩。 ②行为动词：主语+行为动词(+其它)。一般现在时主要用动词的原形表示，如果主语是第三人称单数，则在动词原形后加\或\e.g. He gets up early in the morning. 2.否定句和疑问句的变化 ①be动词的变化： A.否定句：主语+ be + not +其它。 He is not a worker.他不是工人。 B. 一般疑问句：Be +主语+其它。 ---Are you a student? ---Yes. I am. / No, I'm not. C. 特殊疑问句：疑问词+一般疑问句。 Where is my bike? ②行为动词的变化： A.否定句：主语+ don't( doesn't ) +动词原形(+其它)。 I don't like bread. / He doesn't like bread. B. 一般疑问句：Do ( Does ) +主语+动词原形+其它。 ---Do you often play football? --- Yes, I do. / No,

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I don't. --- Does she go to work by bike? --- Yes, she does. / No, she doesn't. C. 特殊疑问句：疑问词+一般疑问句。How does your father go to work? （注意回顾动词第三人称单数形式变化规则） 一般情况下在词尾加s help→helps, clean→cleans, play→plays, wear→wears, give→gives; 以s, x, ch, sh结尾的动词在词尾加es dress→dresses, fix→fixes, watch→watches, finish→finishes;以“辅音字母加y”结尾的动词，把y变为i，再study→studies, carry→carries, fly→flies ） (2)一般现在时的用法 ?1.表示经常性或习惯性的动作或行为。常与always, sometimes, often, usually, never等副词连用。 e.g. I go to school every day except Saturdays and Sundays. My mother often gets up at 6 o’clock. 2.表示现在的状态，能力，性格，个性。e.g. My father teaches maths. Lin Yan dances well. 3.表示普遍真理或客观事实。e.g. The earth moves

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around the sun. The sun rises in the east. 【注意】此用法如果出现在宾语从句中，即使主句是过去时，从句谓语也要用一般现在时。如：Our physics teacher said that light travels much faster than sound. 我们的物理老师说光的传播速度比声音的传播速度快得多，在时间、条件、比较等状语从句中，用现在时表示将来的动作，从句的谓语动词用一般现在时。 如：I will e-mail you as soon as I get to Beijing. 我一到北京就给你发邮件。 If you come this afternoon, we will have a meeting. 如果你今天下午能来，我们就开会。 【例题精讲】 例1. ——Who is that lady? ——She’s Miss Green. She ____ us music, and she is so good. A. taught B. teaches C. will teach D. is teaching 例2. ——I think I’ll take a bus to the meeting. ——The bus? If you ____, you will be late.

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A. do B. have done C. will do 例3. Unless the weather ____, we will have to cancel the picnic. A. improve B. improves C. improved D. will improve 例4. We don’t know if our friend ____. If he ____, we’ll let you know. A. comes; comes B. comes; will come C. will come; comes 例5. Our geography teacher told us that the earth ____ the sun. A. went around B. goes around C. is going around D. was going around 【课堂练习】 1. Look! A dog ____ a blind man across the road. A. leads B. lead C. is leading

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