昆山小学课后补习,小升初英语辅导,希望对您有所帮助。情态动词情态动词也是一类特殊的动词,平时我们不把它说成是动词。情态动词可以和行为动词同时出现在同一个句子中。我们现在学过的情态动词有:can、could、shall、should、will、would、may、might 、must。 注意:情态动词后动词总是用原形。(不受其他任何条件影响)其否定形式:can not = can’t, must not = mustn’t, 注意:may not和shall not(无缩写形式) 练一练: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 ______ you see 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) ______you like a glass of milk? Yes, please. A. May B. Could C. Would( ) 5) ______you see 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. Shall4、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、有些动词要双写蕞后一个字母,再加ed,如:stop – stopped ;
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