【正文】
g,catchcatching,drinkdrinking, enjoyenjoying hurryhurrying ,dodoing , readreading , thinkthinking2. 如果動(dòng)詞以e結(jié)尾,則去掉e,再加ing,如eing , havehaving , makemaking,rideriding,writewriting,taketaking,useusing.3. 如果動(dòng)詞只有一個(gè)元音字母,而其后跟有一個(gè)輔音字母時(shí),將此輔音字母雙寫(xiě),再加ing 如: hithitting,letletting, putputting,runrunning,sitsitting.4. 如果動(dòng)詞有兩個(gè)音節(jié),且重音在第二個(gè)音節(jié)上,則末尾的輔音字母須雙寫(xiě),再加ing, 如: forgetforgetting,preferpreferring,upsetupsetting.試比較 benefit/benfiting, differ/differing,profit/profiting,這些詞的重音在第一個(gè)音節(jié)上,因此其末尾的輔音字母不雙寫(xiě).5. 以 ic 結(jié)尾的動(dòng)詞,應(yīng)先把 ic 變?yōu)?ick,再加 ing,eg: panic/panicking,piic/piicking,但 lie/lying ,die/dying,tie/tying是特殊變化要記住.三、句型結(jié)構(gòu):、否定形式、疑問(wèn)形式及其回答,所有變化都體現(xiàn)在助動(dòng)詞 be ( is / am / are ) 上.1)現(xiàn)在進(jìn)行時(shí)的肯定形式:主語(yǔ)+be(am/ is/are)+doing+其他成分I am singing . They are writing .2)現(xiàn)在進(jìn)行時(shí)的否定形式:主語(yǔ)+be(am/ is/are)+not +doing+其他成分I am not singing . They aren’t writing .3)一般疑問(wèn)句及回答:be(am/ is/are)+ 主語(yǔ)+doing+其他成分Am I singing ? Yes ,you are . / No ,you aren’t .Are they writing ? Yes ,they are . / No ,they aren’t .4)特殊疑問(wèn)句及回答:特殊疑問(wèn)詞+be(am/ is/are)+主語(yǔ)+doing+其他成分What are you doing ? We are playing (要求就提問(wèn)內(nèi)容具體回答).2. 縮寫(xiě)形式如下:I amI’m You areYou’re He isHe’s She isShe’sIt isIt’s We areWe’re They areThey’re: 不是所有動(dòng)詞都能用現(xiàn)在進(jìn)行時(shí)態(tài)的,如:see、like、want、know 等動(dòng)詞往往都不用進(jìn)行時(shí)態(tài).四.用法:( 指說(shuō)話人說(shuō)話時(shí)) 正在發(fā)生的事情.往往與 now,at the moment,just 等副詞連用,以示強(qiáng)調(diào).We are waiting for you. What are you doing? Some one’s knocking at the door.:He’s talking to his friends in the classroom.可用 still 一詞強(qiáng)調(diào)動(dòng)作的持續(xù)性He’s still talking to his friends in the classroom.3. 表示長(zhǎng)期的或重復(fù)性的動(dòng)作,說(shuō)話時(shí)動(dòng)作未必正在進(jìn)行.Mr. Black is writing another article.Don’t take that book away. Your father’s using it.She is learning piano under Mr. Black.,或被認(rèn)為在短期內(nèi)正在進(jìn)行的動(dòng)作或存在的情況:What’s your brother doing these days? He’s studying English at Oxford University.:People are being more and more beautiful these days.6. 表示漸變的動(dòng)詞有:bee,turn,get,grow,run,go,begin等.The leaves are turning brown.It’s getting colder and colder.,constantly,forever 等詞連用,表示反復(fù)發(fā)生的動(dòng)作或持續(xù)存在的狀態(tài),往往帶有說(shuō)話人的主觀色彩.You are always changing your mind.8. 現(xiàn)在進(jìn)行時(shí)(以及 be going to)可以表示為將來(lái)安排好的活動(dòng)和事件 We’re spending next winter in China. 用arrive,e,go,leave 等動(dòng)詞的現(xiàn)在進(jìn)行時(shí)描寫(xiě)行 程安排,也通常有“將到達(dá)”和“將離去”的意思: He’s arriving tomorrow morning.,則有時(shí)含有抱怨,討厭,贊揚(yáng)等的意思:He is always singing at night,and we can’t fall asleep late at night.現(xiàn)在進(jìn)行時(shí)練習(xí)題:1. ______you__________(fly) a kite? Yes,_______.2. ______you___________(sit) in the boat?3. ______he_____________(talk) with me?4. We_______________(play) football now.5. What_________you__________(do)?6. I_____________(sing) an English song.7. What________he____________(mend)?8. He______________(mend) a car.9. These boys _________ (play) tennis on the playground.10. My mother______________ (cook) in the kitchen.11. We can’t help you,because we ____________ (have )classes.12. ________ the boy ___________ (write) his homework?13. Look! These butterflies _________ (fly) in the sky.14. Listen! The girl ___________ (sing) in the next room.15. The naughty boy __________ (swim) in the river.1. Look. Lucy is_____ a new bike today.A. jumping B. running C. riding D takeing2. The children _____ football.A. is playing B. are playing C. play the D. play a3. They ______TV in the evening. They do their homework.A. are watching B. can’t watching C. don’t watch D. don’t watching4. Listen! She____ in the classroom.A. is singing B. sing C .to sing D. is sing5. ______are you eating? I’m eating ______ meat.A. What,some B. Which,any C. Where,not D. What,a6. Is she ____ something?A. eat B. eating C. eatting D. eats dictionary ___,I have looked for it everywhere but still___ it.A. has lost,don’t find B. is missing,don’t find C. has lost,haven’t found D. ismissing,haven’t found.8..Having