现在进行时.doc

文档介绍：)现在进行时表示现在或现在这段时间正在进行的动作。通常与now,atpresent等时间状语连用。2)基本结构:主语+be(am,is,are)+v-ing+…!’)动词现在分词的构成①   一般动词直接在词后加-ingdo–doingread-readingwork–workingthink–thinkingstudy–studyinggo–goingwatch–watchingjump-jumping②   以不发音的字母e结尾的动词,应先去掉e然后加–inglike–likingtake–takingleave–leavinglive–livingreceive–receivingdance–ingsmoke–smokingwrite-writing③   以“一个元音字母+一个辅音字母”结尾的动词,应先双写这个辅音字母然后再加-ingstop–stoppingbegin–beginningdig–diggingswim–swimmingrun–runningsit–sitting(注意:listen–listeningopen–openingeat–eatingrain–rainingsleep-sleeping)