现在进行时(unit1&unit5)一.意义——当表示现在正在进行的动作或正在发生的事
二.:be(am,is,are)+动词现在分词-ing形式肯定句:主语+be+现在分词V-ing(+其他)eg:Thechildrenareplayinginthepark
否定句:主语+be+not+动词-ing+其他
eg:Thechildrenarenotplayinginthepark
一般疑问句:Be+主语+动词-ing+其他
eg:Arethechildrenplayinginthepark
Yes,theyare
/No,theyarenot
特殊疑问句:特殊疑问词+be+主语+动词-ing+其他
eg:Whataretheydoingnow
现在分词的构成:(1)一般在动词末尾直接加ing,如:play→playingsleep→sleepinglook→lookingthrow→throwingbark→barkinglisten→listeningclimb→climbingcry→cryingcall→callingwash→washingeat→eatingbrush→brushingdrink→drinkingcomb→combingclean→cleaninggo→goingdo→doingrain→rainingtalk→talkinggrow→growingopen→openingsing→singingeat→eatingwalk→walking(2)以不发音字母e结尾的动词,先去掉e,再加ing,如:bite→bitingwrite→writinghave→havingdance→dancing(3)以重读闭音节结尾的动词,中间只有一个元音字母,词尾只有一个辅音字母,应双写末尾的辅音字母,再加ing,如:sittingrunningswimming