选择填空。
()1)The sign on the wall means you______stay away from the building.
A.must B.can’t C.shouldn't
()2)How many books______yosee on the desk?A.may B.can C.should
()3)It means you______make noise in the library.A.should B..shouldn't C.can
()4)---______yolike a glass of milk?---Yes,please.A.May B.Could C.Would
()5)---______yosee the sign over there?---Sorry,I can’t.A.Can B.Can’t C.Should
()6)______we go to the park by bus?A.May B.Must C.Shall
4、行为动词
就是我们平时上课时说的动词,表示某一动作或行为。如:sweep、live等。行为动词我们已学过它们的四种形式:原形、第三人称单数+s/es、现在分词(也叫动名词)+ing、过去式+ed。
(1)动词第三人称单数变化规则:
A、一般直接加“s”,如:play–plays,visit–visits,speak–speaks;
B、以“s”,“x”,“sh”,“ch”结尾时,加“es”,如:catch–catches,watch–watches;
C、以“辅音字母+y”结尾时,变“y”为“i”再加“es”,如:carry–carries,study–studies。
(2)现在分词(动名词)构成规则:
A、一般直接加“ing”,如:go–going,do–doing,look–looking;
B、以不发音的“e”结尾的单词,去“e”加“ing”,如:take–taking,make–making,have–having;
C、以重读闭音节结尾的词,如末尾只有一个辅音字母,需要双写这个字母再加“ing”,如:
put–putting,stop–stopping,run–running,get–getting,swim–swimming,sit–sitting,begin–beginning,
jog–jogging,forget–forgetting。
(3)过去式构成规则:
A、一般直接加“ed”,如:plant–planted,visit–visited,pick–picked;
B、以不发音字母“e”结尾,直接加“ed”,如:like–liked,hope–hoped,taste–tasted;
C、以“辅音字母+y”结尾时,变“y”为“i”再加“ed”,如:try–tried,carry–carried,study–studied;
D、有些动词要双写最后一个字母,再加“ed”,如:stop–stopped;
E、还有很多动词的过去式是不规则的,请记忆:
是-am(be)-was-being;是-are(be)-were-being;是-be-was,were-being;
成为-become-became-becoming;开始-begin-began-beginning;弯曲-bend-bent-bending;
吹-blow-blew-blowing;买-buy-bought-buying;能-can-could-----;
捕捉-catch-caught-catching;选择-choose-chose-choosing;来-come-came-coming;
切-cut-cut-cutting;做-do,does-did-doing;画-draw-drew-drawing;饮-drink-drank-drinking;吃-eat-ate-eating;感觉-feel-felt-feeling;发现-find-found-finding;飞-fly-flew-flying;忘记-forget-forgot-forgetting;
得到-get-got-getting;给-give-gave-giving;走-go-went-going;成长-grow-grew-growing;
有-have,has-had-having;听-hear-heard-hearing;受伤-hurt-hurt-hurting;保持-keep-kept-keeping;
知道-know-knew-knowing;学习-learn-learned,learnt-learning;允许,让-let-let-letting;躺-lie-lay-lying;
制造-make-made-making;可以-may-might----;意味-mean-meant-meaning;会见-meet-met-meeting;
必须-must-must----;放置-put-put-putting;读-read-read-reading;骑、乘-ride-rode-riding;
响、鸣-ring-rang-ringing;跑-run-ran-running;说-say-said-saying;看见-see-saw-seeing;将-shall-should----;唱歌-sing-sang-singing;坐下-sit-sat-sitting;睡觉-sleep-slept-sleeping;说-speak-spoke-speaking;
度过-spend-spent-spending。
练一练:
1、写出下列动词的第三人称单数。