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windows8.1怎么恢复出厂设置

windows8.1版本(windows8.1正式版下载)

buy的第三人称单数(什么时候用三单口诀)

时态易错题一、一般现在时:主语+动词原形或动词三单+多次发生的时间(如频度副词alwaysusuallyoftensometimesonmondays)动词原形变三单规则:1.一般情况下直接加s。2.以s/x/ch/sh/o结尾的动词加es。3.以元音字母+y结尾的动词直接加s。(元音字母有a/e/i/o/u)以辅音字母+y结尾的动词变y为i加es。4.以f/fe结尾的动词变f/fe为v加es。(仅了解)5.特殊:have的三单是has二、现在进行时:主语+be+动词ing+表示现在的时间(如now,look,listen)动词原形变动词ing的规则:1、一般情况直接加ing。2、以不发音的e结尾的去e加ing。3、双写最后一个辅音字母加ing:run-running,swim-swimming,shop-shopping,get-getting,sit-sitting,cut-cutting,win-winning一、写出下列单词的第三人称单数及动词ing形式。1、buy_______________2、clean_______________3、help_______________4、find_______________5、pass_______________6、try_______________7、get_______________8、come_______________9、fly_______________10、love_______________11、eat_______________12、pack_______________13、wait_______________14、speak_______________15、finish_______________16、wash_______________17、watch_______________18、do_______________19、read_______________20、play_______________21、sing_______________22、dance_______________23、draw_______________24、cook_______________25、swim_______________26、learn_______________27、study_______________28、want_______________29、send_______________30、live_______________31、have_______________32、take_______________33、make_______________34、start_______________35、late_______________36、need_______________37、win_______________38、pick_______________39、meet_______________40、plant_______________41、look_______________42、climb_______________43、jump_______________44、drink_______________45、sleep_______________46、listen_______________47、talk_______________48、like_______________49、say_______________50、teach_______________51、catch_______________52、see_______________53、ask_______________54、give_______________55、tell_______________56、wear_______________57、visit_______________58、join_______________59、share_______________60、use_______________61、type_______________62、chase_______________63、hurt_______________64、hear_______________65、worry_______________


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