英语人教版八年级下册“一般过去时.ppt

五、一般过去时与现在完成时之比较一般过去时表示过去某时发生的动作或单纯叙述过去的事情,强调动作,和现在不发生关系。而现在完成时表示过去发生的某一动作对现在造成的影响或结果,强调的是现在的情况。现在完成时一、基本结构:主语+助动词have/has+动词的过去分词肯:(She,It)(You,They):主语+助动词haven’t+动词的过去分词hasn’tHe(She,It)hasnot/hasn’(You,They)havenot/haven’=haven’thasnot=hasn’t练一练1)句型转换:::_______________________________?_________________________________Ihaven’?Yes,Ihave./No,Ihaven’’?Yes,Ihave./No,Ihaven’)用现在完成时连词成句I,finish,,ecutdoflygokeeprunwas--beenwere--beenbecame—ecut-cutdid--doneflew--flownwent--gonekept--keptran--ebuybringtakemakesitfeedwrote--writtendrove--drivencame--comebought--boughtbrought--broughttook--takenmade--madesat--satfed--fedalready和yet的用法already已经通常用于肯定句中或句末yet已经,还通常用于疑问句和否定句末我已经找到了我的尺子。:Ihaven’:Haveyoufoundyourruler____?。?______youtheflowers______?。。。:1)for+一段时间eg:。forayearfortwoweeksforthreeyearsfortwoyearshavestudied