微课屈庆庆.pptVIP

一般现在时vs.现在进行时 时态(tense)的概念 英语中不同时间和方式发生的动作或状态要用谓语动词的不同形式来表示，这种表示动作或状态发生时间和方式的动词形式称作动词时态。在英语中有16种时态。 英语动词的常用时态有以下几种： 一般现在时 一般过去时 一般将来时 现在进行时 过去进行时 现在完成时 过去完成时 一般现在时动词?“单三”?的变化规则 1.?一般在动词结尾直接加-s ???e. g.???help --- helps?????????climb --- climbs ?????????? talk --- talks??????????sing --- sings ?2. 以s, x, ch, sh, o结尾的动词加-es; ???e. g.???teach --- teaches????guess --- guesses ??????????? wash --- washes???????go --- goes???????? ?3.?以辅音字母 + y结尾的动词, 变y为i后, 加-es ???e. g.???study --- studies????try --- tries???? ?????????? ?fly --- flies???????? 现在分词的构成? 1.一般情况下，在动词原形后直接加词尾 –ing。 ?e.g. go – going; do – doing;  特别要注意：这和第三人称一般现在时的词尾变化不 同，动词词尾如为“辅音字母 + y” 时不变，在其后直接加 –ing。?e.g.study – studying; carry – carrying; fly – flying; 2.在以不发音的e 结尾的动词后，去掉e，再加- ing。?e.g. come – coming dance – dancing make – making?3.在闭音节的单音节动词后、以重读闭音节结尾的多音节动词，而末尾只有一个辅音字母时，将这个辅音字母双写（x除外），然后再加 –ing.? e.g. sit – sitting; run – running; begin – beginning; 4.在少数几个以 –ie 结尾的动词后：须将–ie 变作y，再加- ing。e.g. die – dying; tie – tying lie – lying? Exercises 一、写出下列动词的第三人称单数形式 work__________ write__________ teach__________ wash__________ guess__________ do___________ study__________ play__________ have__________ 二、写出下列动词的现在分词形式 work___________ sing__________ study__________ dance__________ take__________ run__________ swim__________ lie__________ 三、单项选择 1. Who ___ over there now? A. singing B. are sing C. is singing D. sing 2. Listen! The baby _____ in the next room. A. crying B. cried C. is crying D. cries 3. Tom is a worker. He _____ in a factory. His sisters _____ in a hospital. A. work;work B. works;work C. work;works 4. Mrs. Read _____ the windows every day. A. is cleaning B. clean C. cleans 5. The twins usually _____ milk and bread for breakfast, but Jim _____ some coffee for it. A. have; have B. have;has C. has;have 6. She _____ up at six in the morning.