精讲初中五种时态一般现在时的,一般过去式,现在进行,现在完成时,一般将来时课件.ppt

动词的时态 初中英语的动词时态主要有五种:一般现在时,一般过去时,一般将来时,现在进行时,现在完成时. 1. 一般现在时： 构成:主要由动词原形表示，但在第三人称单数时要在词尾加-s 。否定句和疑问句要用助动词do, does. 一般现在时 的标志性时间：every( year,otherday ,twodays,week,month…) ,often ,always,usually ,sometimes, in the morning,in summer,on Sunday 用法3种情况 A. 经常性或习惯性的动作。如The trees get green in spring . 。B现在特征或状态。如The Changjiang River is the longest in our country.He doesn` t work in the factory .C.普遍真理。如The sun rises in the east . Five and two in seven . 否定形式：1.don’t+动词原形 I don’t like it. They don’t like it. 　　 2.当主语是第三人称单数时，则为: doesn’t+动词原形 He doesn’t like it. 一般疑问句：把do 或does 放在主语的前面， 后面动词用原形 Do you like it? Does Ann like it?　Does he like it ? 2现在进行时： 构成：句子的结构如下： be am 　　　　　　　　　　　　　 is +动词的“－ing”形式 　　　　　　　　　　　 are 标志性时间now 用法 A,主要表示现在或现阶段正在进行的动作。如： 1. I am listening to the music now. 2. The students are drawing pictures now. 3. Listen! She is singing . 4. Look! Mr Li is riding a bike. B,有些动词的现在进行时表示近期按计划或安排要进行的动作。这些动词是：go ,come, leave ,start ,arrive , return ,work sleep,stay,play,do,have ,wear…..She is coming to see me tomorrow. 其中，动词的ing形式变化规则： A.在动词后直接加ing: go-going , wash-washing,fly—flying B.以单个元音+单个辅音+e结尾 ， 去掉e加ing,如 ：drive—driving, ride--riding C.某些单词要双写词尾的字母：swim- swimming run—running get--getting 一、选择题练习 1. Who ____ over there now? A. singing B. are sing C. is singing D. sing 2. It’s eight o’clock. The students _____ an English class. 　A. have B. having C. is having D. are having 3. Listen! The baby _____ in the next room. A. crying B. cried C. is crying D. cries 4. Look! The twins _____ new sweaters. 　A. are wearing B. wearing C. are wear D. is wearing 5. Don’t talk here. Grandparents _____. A. is sleeping B. are sleeping C. sleeping D. sleep 6. Tom is a worker. He _____ in a factory. His sisters _____ in a