外研版小学英语(三起)三年级下学期四种时态(含动词变化规则)知识与练习

1、动词的第三人称单数（单三形式）、现在分词（动词-ing形式）、过去式变化规则动词的第三人称单数变化规则1.一般直接在词尾加-s。如：help-helps know-knows get-gets read-reads 2.以字母s, x, ch, sh或有些以o 结尾的动词加-es。 如：guess-guesses fix-fixes teach-teaches wash-washes go-goes do-does 3.辅音字母+y结尾的动词，先变y为i，再加-es。如：carry-carries fly-flies 元音字母+y结尾的动词，直接加-s。如：playplays saysays4

2、. be动词的第三人称单数分别为am, is,（are是you“你”的单数），have的第三人称单数则为has。 动词的现在分词（动词的-ing形式）变化规则1.一般情况直接加-ing。如：looklooking gogoing visitvisiting 2.以不发音的e结尾的，去e再加-ing。如：comecoming makemaking writewriting 3.以重读闭音节结尾并且只有一个辅音字母的，双写该辅音字母，再加-ing。如：run-running stop-stopping get-getting swim-swimming4.以辅音字母加y结尾的，直接加-ing。如：

3、study-studying carry-carrying fly-flying cry-crying 以元音字母加y结尾的，直接加-ing。如：play-playing say-saying5.以ie结尾的重读开音节动词，先变ie为y，再加ing。如：diedying tietying lielying 动词的过去式变化规则：一、规则变化： 1.一般直接在动词后加-ed。如：call-called open-opened look-looked want-wantedneed-needed2.以不发音的字母“e”结尾的，直接加-d。如：livelived movemoved hopehope

4、d3.以辅音字母加y结尾的动词，先变y为i，再加-ed。如： studystudied crycried trytried以元音字母加y结尾的，直接加-ed。如：playplayed， enjoyenjoyed 4.以一个辅音字母结尾的重读闭音节动词，双写最后一个辅音字母，再加-ed。如：planplanned fitfitted stopstopped 二、不规则变化（要特殊记忆）： 以下是一些常见的动词的过去式：am,is-was are-were, do-did, see-saw, say-said, give-gave, get-got, go-went come-came have/

5、has-had eat-ate, take-took run-ran put-put make-made read-read write-wrote draw-drew drink-drank fly-flew ride-rode speak-spoke sweep-swept swim-swam sit-sat hear- heard sleep-slept let-let blow-blew hurt-hurt speak-spoke buy-bought keep-kept swim-swam eat-ate catch-caught know-knew stand-stood choo

6、se-chose lie-lay leave-left draw-drew teachtaught drink-drank make-made tell-told think-thought mean-meant feel-felt drive-drove meet-met writewrote find-found fly-flew forget-forgot ring-rang see-saw ride-rode grow-grew sing-sang/sung begin-began learn-learned/learnt附：名词复数变化规则 （比较动词第三人称单数形式的变化

7、规则）1.一般在名词后面加 “s”。如：pen-pens， sweet-sweets  2.以s， sh， ch， x或有些以o结尾的词加“es”。如：bus-buses  box -boxes  photo-photos zoo-zoos tomato-tomatoes  potato-potatoes3.以辅音字母y结尾的词，变y为i加es。如family-families library -libraries  

8、;  以元音字母y结尾的词，直接加s。如monkey-monkeys    toy-toys   小学英语四种时态时间标志记忆口诀1.一般现在时：“总经常有每没（美眉）复星周”总：always（总是）， usually（通常）等经常：often（常常）有：sometimes （记住，“有”不是have，而是“有时”）每：every  week/month/year 等（每一个）没：never（从不）复星周：on mondays（在每一个星期一）on tuesdays（在每个周二）等2.一般过去时

9、：“昨天上个xx（读作叉叉）前，in加年份when字连”昨天：yesterday， 后面可以加morning， afternoon，evening等上个：last，后面可以加week， month，year等xx前：ago，前面可以加three weeks/months/years  agoin加年份：in 2009/2008/1986/1220等   when字连：when（当的时候）i was a child等， when字后面都是过去时，与其相连的另一个句子也要用一般过去时。例如：when i was a child,i could(can的过去式

10、)ride a bike. 可以说成：i could(can的过去式)ride a bike when i was a child.3.一般将来时：正好和一般过去时对应：“明天下个xx后”明天：tomorrow，后面可以加morning， afternoon，evening下个：next，后面可以加week，month，year等xx后：after和in，后面可以加three weeks/months/years这里要注意一下，after后加时间点才表示将来，如after 3 oclock 。加时间段表示过去，如after 2 hours 表示过去。in后加时间段表将来，如in two yea

11、rs。4.现在进行时：“现在时刻看和听，最近在哪请安静。”现在：now， at present， at the moment等时刻：its ten oclock. im beating xiaoqiang.看和听：look！ listen！后面一般都用现在进行时。最近：what are you doing recently/these days？在哪：where is xiao z？ xiao z is beating xiaoqiang.请安静：be quiet！/dont make any noise！/stop making noise！xiaoqiang is sleeping.exe

12、rcises用所给动词的适当形式填空1. how old _(be) he? 2. he often _(play) chess with tom. 3. they can _(swim) now. 4. lucy _(visit) the zoo last week. 5. _(do) lily enjoy the trip last year? 6. what_(be) your favourite toy? 7. there _(be) much water on the ground. 8. the workers _ _(be) _(listen) to the manager. 9

13、. do you like_ _(play) football? 10. why not_ _(take) a rest? 11.i_(talk).you_(listen)to me now.12. he_(study) english very hard.13. -what are you doing?-i_(do) my homework.14. today is a sunny day. we _ (have) a picnic this afternoon.15. it _ (be) there just now, but it isnt there now.16. yang ling _ at home now. but she _ at school yesterday.（be）17. he _ back a month ago. (come)18.now its a beautiful day.lets _(go) to the park.19.i want_(drink)some colas,please.20.who can _(help)the girl?she cant_(carry) everything.21.in this