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1、现在分词的变化规律1 一般情况下,直接在动词后加-ing work - working sleep - sleeping study - studying2 动词以不发音的-e结尾,要去-e加-ing take - taking make - making dance - dancing3 闭音节的单音节词,或以重读闭音节结尾的多音节词,这些词的末尾只有一个辅音字母时,双写这个辅音字母,再加 -ing.cut - cutting put - putting begin - beginning 4 以-ie结尾的动词,把ie变成y再加-inglie - lying tie - tying die
2、 - dying动词的过去式变化规律规则动词的过去式由“动词原形+-ed”构成,具体变化有:1. 直接在词尾加-ed。wantwanted,workworked,needneededcleancleaned 2. 以不发音的e结尾的在词尾加-d。如:likeliked,livelived, useused, movemoved 3. 以一个元音字母加一个辅音字母结尾的重读闭音节动词,先双写结尾的辅音字母,再加-ed。如:stopstopped, triptripped 4. 以辅音字母加y结尾的动词,先把y变成i,再加-ed。如:studystudied, carrycarried, hurr
3、yhurried, marrymarried不规则动词的过去式见课本后的不规则动词表。大体上归纳有以下六条记忆法:1. 以t结尾的词,过去式与原形相同。如:putput, letlet, cutcut, beatbeat 2. 以d结尾的词,把d变成t。如:buildbuilt, lendlent, sendsent, spendspent 3. 以n结尾的词,在词后加t。如:meanmeantburnburnt,learnlearnt 4. 以ow / aw结尾的词,把ow / aw变成ew。如:blowblew, drawdrew, knowknew, growgrew 5. 含有双写字母
4、的词,将双写改为单写,在词尾加t。如:keepkept,sleepslept, feelfelt, smellsmelt 6. 含有元音字母o / i的词,将o / i变成a。如:singsang,givegave, sitsat, drinkdrank 规则动词词尾加-ed有三种读音: 1. 在清辅音后读作t。如:asked, helped, watched, stopped 2. 在浊辅音和元音后读作d。如:enjoyed, studied, moved, called 3. 在t / d后读作id。如:wanted, needed动词的三单变化规律一般现在时主语单三人称时的动词变化 在一
5、般现在时中,当主语为第三人称单数时,动词要用“s”型(即第三人称单数形式)。 所谓动词“s”型的构成,可按名词变复数的规则来记,即: i) 在动词尾直接加 s。如: playplays, wantwants, workworks, knowknows, helphelps,getgets ii) 以字母s、x、ch或o结尾的动词加-es;如: guessguesses, fixfixes, teachteaches, brushbrushes, gogoes,dodoes,watchwatches,catchcatches iii) 以辅音字母y结尾的动词,先变y为i,再加-es。如:stud
6、ystudies,carrycarries,flyflies,worryworries 强调如何将主语是第三人称单数的肯定句变为否定和疑问句。现举例说明(用划线部分来说明顺口溜): 1) His mother works in a factory His mother doesnt work in a factory Does his mother work in a factory?2) Mr Li teaches us English Mr Li doesnt teach us English Does Mr Li teach you English? 3) My brother studies maths well My brother doesnt study maths well Does your brother study maths well?