一般现在时的结构
一般现在时的结构及用法一般现在时结构: 1. 主语+谓语+其他(表动作)；2. 主语+be+表语（形容词、名词充当表语）。当主语是第三人称单数时，动词变相应的第三人称单数形式。(1) be(am,is,are)动词：(作谓语动词时) 肯定句:主语+be动词(am,is,are)+其它。如： ①I am a student.(主语+be动词+名词)②They are hungry.（主语+be动词+形容词）③He is out.(主语+be动词+副词)④That pen is mine.(主语+be动词+代词)⑤I am fifteen.(主语+be动词+数词)⑥The bike is under the tree.(主语+be动词+介词短语) 运用am,is,are写三个句子否定句：主语+ be(am,is,are) + not +其它。如：He is not a worker.他不是工人。 运用am,is,are写三个句子一般疑问句：Be(am,is,are) +主语+其它。如：-Are you a student? -Yes. I am. / No, I’m not. 运用am,is,are写三个句子特殊疑问句：疑问词+一般疑问句。如：Where is my bike? 运用am,is,are写三个句子特殊疑问句：疑问词（what, where, who, when, which, whose, how, how many, how much, what shape,what colour,）,找句子中有没有be动词（is, am或者are）或情态动词或者助动词（特殊疑问句:疑问词+be动词（is, am或者are）或情态动词或者助动词+其他?）(2)行为动词：主语+行为动词+（其它）1.主语不是第三人称单数时，肯定句为：主语+动词原形+其它否定式为：主语+don’t+动词原形+其它疑问句为：Do+主语+动词原形+其它？e.g. ①We speak Chinese.②Do you speak Chinese? —Yes, I do. / No, I don’t.③They don’t speak Chinese. 写三个句子2.当主语是第三人称单数时： (he,she,it,A/An,单独的人或事物:Lily/book)肯定句为:主语+动词（词尾加s或es）+其它。否定式为：主语+doesn’t+动词原形+其它.疑问句式：Does+主语+动词原形+其它？①He speaks English.②He doesn’t speaks English.③- Does she go to work by bike? Yes, she does. / No, she doesn’t. 写三个句子特殊疑问句：疑问词+一般疑问句。如：How does your father go to work?3.动词+s的变化规则(1)一般情况下，直接加-s，如：cook-cooks, milk-milks(2)以s. x. sh. ch. o结尾，加-es，如：guess-guesses, wash-washes, watch-watches, go-goes(3)以”辅音字母+y”结尾，变y为i, 再加-es，如：study-studies(3)情态动词（作谓语动词时)(can,could,be able to,may,might,must,have to,need,shall,should,will,would)时， 句子结构为：肯定句：主语+情态动词+动词原形。否定句：主语+情态动词+not+动词原形 一般疑问句;情态动词+主语+动词原形+其他？特殊疑问句：疑问词+情态动词+主语+动词原形+其他？Eg: ① He can speak English.② Can I help you? What can I do for you?在实际应用中，一般现在时常与以下时间状语联用：always, usually, often, sometimes, every week (day, year, month…),once a week, on Sundays ……例句：He usually plays football on Sundays.
