1、什么是“三单”？,“三单”是“第三人称单数”的简称。 英语中的第三人称与汉语中一致，为他（he）、她（she）、它（it）。 除此之外，具体的个人或个物也是第三人称单数形式，如：Tom, a boy, a dog等等。,我是 I,第一人称,第二人称,我们 we 他们 they 你们 you,复数,男他 he 女她 she 物它 it 单个人名 单个事物 单个地点,第三人称单数,动词的第三人称单数特征,根据主语的人称和单复数不同，英语中谓语动词的形式也有所不同。如： I eat an apple. You do your homework. She eats an apple. He does
2、his work.,如上所示，当主语为第三人称单数时，动词要做相应的变化，这就是动词的“三单”形式。动词第三人称单数一般以-s, -es, -ies结尾。,动词“三单”的变化,get,make,read,live,walk,eat,eats,lives,makes,gets,reads,walks,观察一：上述单词变形有何规律？,teach,wash,catch,fix,match,guess,matches,washes,teaches,catches,fixes,guesses,观察二：上述单词变形有何特征？,study,fly,try,copy,carry,identify,flies,
3、copies,studies,tries,identifies,carries,观察三：上述单词变形有何规律？,动词“三单”的变化规律,观察一：一般动词后面直接加 -s. 例如： work-works，get-gets，say-says， read-reads 观察二：以ch, sh,s,x 或 o 结尾的动词,在后面加 -es。例如： go-goes，teach-teaches， wash-washes ， brush-brushes catch-catches，do-does ，fix -fixes 观察三：以辅音字母 + y结尾的动词，把 y变为 i 再加 -es. 例如： study-
4、 -studies ，try-tries ， carry-carries，fly-flies ， copy-copies,注意,除了上述基本规律之外，英语中还存在一些无规则的第三人称单数变形。这些需要我们特别记忆，如： go - goes do - does have - has,练习,用所给单词的适当形式完成句子。,1、He often _ basketball with his brother Tom. (play) 2、Amy _ many women dancing in front of the supermarket. (watch） 3、My father _ to work a
5、t 7:30 every day. (go) 4、The plane _ from Beijing to NewYork. (fly) 5、The dog _ to jump over the fence. (try) 6、Tina _ a sister and two brothers. (have),plays,watches,goes,flies,tries,has,1.My teacher _ (speak) Chinese well. 2.She _ (love)reading . 3.Ted _ (have) a brother. 4. I _(is, am, are) a stu
6、dent.,用单词恰当形式填空,speaks,loves,has,am,5.You _ (study) English well. 6.We _(like) singing. 7.John _ (spend) a lot of time with TV. 8. My brother _ (watch) TV every night.,study,like,spends,watches,肯定句变否定： 1. 找 is , am ,are , can等词。变否定更容易，词后not莫忘记。 2.添：动词是原形，动词前加dont 动词是第三人称(-s)在动词前加 doesnt，动词变原形 3.如果还有
7、some在，快用 any换过来。,变否定,I am a new student. 否定： am am not 2. She has a toy. 否定: has does not have,3. Ted works in a school. 否定:works does not work 4. He plays table tennis well . 否定：plays does not play,5. They can speak English . 否定：can can not 6.It love eating meat. (love) 否定:loves doesnt love,7. This is an apple. 否定： is is not 8. Graces father spends some time with Grace. 否定： spends doesnt spend,9.They have some new friends. 否定： They _ new friends.,dont have any,The end ! Thank you !,
