外研版(三年级起点)小学英语语法时态讲解与归纳

小学英语语法时态讲解与归纳—一般现在时 一. 意义：表示经常发生的事情，动作或存在的状态 二. 构成及变化 1.be动词的变化。 肯定句：主语+be(am,is,are)+其它。如：　I am a boy.我是一个男孩。 否定句：主语+ be + not +其它。如：He is not a worker.他不是工人。 一般疑问句：Be +主语+其它。 如：-Are you a student 　-Yes. I am. / No, I'm not. 特殊疑问句：疑问词+一般疑问句。如：Where is my bike 2. 行为动词的变化。 l、当主语为第一，二人称及复数时，助动词为do 肯定句：主语+动词原形(+其它)。如：　We often play basketball after school. 否定句：主语+ don't+动词原形(+其它)。如：we don’t play basketball after school. 一般疑问句：Do +主语+动词原形+其它 如： Do you often play basketball after school Yes, we do. / No, we don't. 特殊疑问句：疑问词+以do开头的一般疑问句？ 如： What do you often do after school ２、当主语为第三人称单数时 , 助动词为does 肯定句：主语+动词三单式(+其它)。如： He swims well. 否定句：主语+ doesn’t+动词原形(+其它)。如：He doesn’t swim well.. 一般疑问句：Does +主语+动词原形+其它。 如：Does he swim well Yes, he does. / No, he doesn't. 　特殊疑问句：疑问词+以does开头的一般疑问句？ 如： How does your father go to work 三．第三人称单数的动词变化规则（只有在第三人称为主语的肯定句中，动词才用三单式） (1)多数动词直接加s:runs　　gets　　likes　　collects　　takes　　plays　　climbs……. (2)结尾是s, x, sh, ch, o,前为辅音字母,结尾加es :　watches　teaches　goes　does　washes　crosses　mixes　brushes (3)动词末尾y前为辅音:将y改为i加es: study→studies fly→flies carry→carries 四．时间标志：always , usually , often , sometimes ,every… 一般现在时练习题（１） I.用下列单词的适当形式填空 1.We often_____(play) in the playground. 2.He _____(get) up at six o’clock. 3._____you _____(brush) your teeth every morning 4.What_____(do) he usually_____(do) after school 5.Danny _____(study) English, Chinese, maths, science and Art at school. 6.Mike sometimes _____(go) to the park with his sister. 7.At eight at night, she _____(watch) TV with his parents. 8._____ Mike_____(read) English every day 9.How many lessons_____your classmates_____(have) on Monday 10.What time_____his mother_____(do) the housework II.改句子 1.Do you often play football after school (改为肯定句) 2.I have many books.（改为否定句） 3.Gao Shan’s sister likes playing table tennis （改为否定句） 4.She lives in a small town near New York.（改为一般疑问句） 5.I watch TV every day.（改为一般疑问句） 6.We have four lessons.（改为否定句） 7.Nancy doesn’t run fast （改为肯定句） 8.My dog runs fast. 否定句 9.Mike has two letters for him. 一般疑问 10.I usually play football on Friday afternoon. 划线提问 11.Su Yang usually washes some clothes on Saturday. 划线提问: 12.Mingming usually waters the flowers every day. 划线部分提问: 13.Tom does his homework at home. 划线部分提问 一般现在时练习题（２） 一、用所给动词的真确形式填空 1.I like _____ (swim). 2.He _____(read) English every day. 3.We _____(go)to school at seven in the morning. 4.Mike_____(go)to school at seven in the morning. 5.My mother_____(like) _____(go) sho ... ...