单三形式现在分词过去式,主语是第三人称单数形式时，动词的变化,1,动词的 ing 形式构成法,动词的过去式的构成法,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,2,3. 在 t / d 后读作id。如：wanted, needed,不规则动词的过去式见课本后的不规则动词表。大体上归纳有以下几条记忆法,以 t 结尾的词，过去式与原形相同。 如：putput, letlet, cutcut, beatbeat，costcost， hithit 以 d 结尾的词，把 d 变成 t。 如:buildbuilt, lendlent, sendsent, spendspent （readread） 以 n 结尾的词，在词后加 t。 如：meanmeant, burnburnt, learnlearnt 以 ow / aw 结尾的词，把 ow / aw 变成 ew。 如：blowblew, drawdrew, knowknew, growgrew，throwthrew 含有双写字母的词，将双写改为单写，在词尾加 t。 如：keepkept, sleepslept, feelfelt, smellsmelt，sweepswept 只去掉一个 e： feedfed，meetmet 闭音节词，改 i 为 a。 如：sitsat, swimswam, ringrang, drinkdrank，singsang，beginbegan， 开音节词，改 i 为 o。 如：drivedrove, riderode, writewrote, buybought, bringbrought, thinkthought, catchcaught, teachtaught 10.laylaid, saysaid, paypaid 母鸡“下蛋”并“摆放”好后，“说”，“付钱” 11.is/amwas, arewere, have/hashad, dodid, gowent, runran, seesaw, flyflew, getgot, winwon, eatate, comecame, makemade, telltold, taketook, fallfell, speakspoke, wearwore, standstood, becomebecame, forgetforgot, hearheard,3,cancould, willwould, shallshould, findfound