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1、学习必备欢迎下载第四课时语法知识词法（ 3）五、动词这里所说的动词是指各种动词总称，其中包括 be 动词、情态动词、助动词、行为动词（就是我们平时总说的那种动词） 。动词、名词和形容词不太容易区分，如不能一眼看出，可用如下方法：先用 “一（量词） ”（如：一个、一张等）和这个词连起来说，如说得通，一般认为是名词；说不通再用 “很”去判断，就是把 “很”和为个词连起来说，说得通一般就是形容词；都说不通就是动词。 （目前我们学过的，以后可能不同）1、be 动词（am, is, are, ）1）amwas, is was, are-were 口诀：我用 am, 你用 are, is 用在他她它，所有
2、复数全用 are。2）肯定和否定句I am (not) from London.He is(not) a teacher.She is(not) in the dining room.My hair is(not) long.Her eyes are(not) small.3）一般疑问句Am I a Chinese? Yes, you are. No, you aren.tAre they American? Yes, they are. No, they aren t.Is the cat fat? Yes, it is. No, it isn t.4）be 动词的否定形式： am not（
3、没有缩写形式），are not = aren，isnot = isn。 t2、助动词（do, does, ）do, does用于一般现在时，它们通常用在疑问句和否定句中。它们的否定形式： do not = dont, does not = doesnt, did not。 = didnt注意：在一般现在时中，does用于第三人称单数，其余一律用助动词do；助动词 do, does,后面一定要用动词原形。3、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、wi
4、ll 、 would、may、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注t,意：may not 和 shall not（无缩写形式）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。学习必备欢迎下载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、（ 1）动词原形情态动词 + 动词原形help+动词原形助动词 +动词原形have to+动词原形Shall we +动词原形祈使句动词原形开头want +to+动词
5、原形how +to+动词原形would like +to+ 动词原形Would you like + to+动原be happy +to+动词原形Let +宾格 +动词原形It s time +to+动词原形can t wait to+动词原形（ 2）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, watchwatches ；C、以“辅音字母 +y”结尾时，变“ y为”“ i再”加 “ es，”如：ca
6、rry carries, studystudies 。（ 3）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, beg
7、in beginning, forget forgetting 。be+动词 inglike+ 动词 ingbegin+动词 ingno+动词 inggo+动词 inglove+动词 ingstart+动词 ingstop+动词 inghow about/What about+动词 ingbe good at+动词 in不是祈使句，放在句子开头的动词要加ing学习必备欢迎下载练一练：一、 用 be 动词的适当形式填空1. What _ you doing here?2. Jimmy _ absent from school last Monday.3. There _ a lot of peo
8、ple here yesterday.4. We _ going to give her the key tomorrow.5. Smith and I _ at thebarber slast night.6. There _ a tree, a tiver, and many flowers on the picture.7. That pair of shoes_ (be) new.二、用适当的助动词填空。1) _you like this magazine?2) -What _ she _ at the weekends? -She usually plays games with h
9、erfriends.3) -What_ you do last Sunday? -I wrote to my friend.4) -Did you see a Beijing opera? -No, I _.三、用动词的适当形式填空。（ 1） I _to school from Monday to Friday. My brother often _to schoolwith me. We like _to school very much.( go )（ 2） They usually _lunch at home. ( have )（ 3） My sister likes _very mu
10、ch. She often _at our school festival.（ 4） What _ he usually _on Sunday?He usually _his homework. Look! He _his homework now. ( do )（5）Do people usually_ moon cakes at Mid-autumn Festival? Yes, they do. Doyoulike _moon cakes Yes, I do. ( eat )(6) I want_ apples.(pick)四、写出下列动词的现在分词。put _give _fly _get _dance _sit_run _take _swim _ask _stop _take _