一般现在时和一般.ppt

一般现在时和一般过去时一般现在时和一般过去时 的区别的区别 浚县教师进修学校 刘风平 1、从时间概念上来讲：一般现在时属于现在的时间范畴；一般过去时属于过去的时间范畴。2、从用法上来讲：一般现在时表示经常性的、习惯性的动作或存在的状态.He often visits his grandparents.一般过去时表示过去某个时间发生的动作。I met my teather in the street last weekend.3、从时间状语上来讲：一般现在时常与always/usually/often/sometimes/every day/in the morning/once a day/twice a week等时间状语连用；They clean the classroom twice a week.一般过去时常与yesterday/last week/two days ago/in the past/just now/on the other day等过去的时间状语连用My father studied at this school twenty years ago.4、从句子的构成来讲：一般现在时主要有动词原形表示、当主语是单数第三人称时动词do需要加上s或es.否定句和疑问句用do或does来否定和疑问。而一般过去时则需要用动词do的过去式表示。否定句和疑问句用did来否定和疑问。.Mary does her homework in the evening.Mary did her homework yesterday afternoon.Does Mary do her homework in the evening?Did Mary do her homework yesterday after-noon?5、从动词的变化上来讲：一般现在时动词do有人称和数的变化；一般过去时动词do则没有人称和数的变化。My classmates and I help grandma once a week.Liu Mei often helps her parents.We went to America last year.He went to UK with his parents last year.注意：一般现在时动词do单数第三人称要加s/es；一般过去时动词do则有规则动词和不规则动词之分。课堂练习:改写下列句子He reads English every morning（.改为否定句）He doesnt read English every morning.Ann does her homework every day.(用yesterday改写)Ann did her homework yesterday.She had some bread this morning.(改为一般疑问句)Did she have any bread this morning.We dont go to school on weekends.（用last weekend改写）We didnt go to school last weekend.Does he go to the park on Sunday.(改为肯定回答)Yes,he does.作业用所给动词的适当形式填空We often_（play）in the playground after school.He _(get)up at six oclock._Mike _(read)English every day?Tom and Mary _（come）to China last month.My mother _(not do)housework yesterday.What _ you _(do)last weekend?