小学英语语法.doc

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
。
肯定句:主语+be(am,is,are)+其它。如: I am a 。
否定句:主语+ be + not +其它。如:He is not a 。
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 l?    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?
(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:
run
s gets likes collets 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
cry→cries
但在y前如果为元音则直接加s: buys says
:always , usually , often , sometimes ,every…
一般现在时练习题(1)

often___________(play) in the playground.
_________(get) up at six o’clock.
_________(brush) your teeth every morning?