一般现在时中，当主语是第三人称单数时，即常在动词原形后加-s或-es。
第三人称单数变化，现归纳总结如下：
1.人称代词he, she, it是第三人称单数。如：
He likes watching TV.他喜欢看电视。
She has lunch at twelve.她十二点吃午餐。
It looks like a cat.它看起来像只猫。
2.单个人名、地名或称呼作主语；用第三人称单数。如：
①Han Mei looks like her mother.韩梅看起来像她的母亲。
②Beijing is in China.北京在中国。
③Uncle Wang often makes cakes.王叔叔经常做蛋糕。
3.单数可数名词或"this / that / the/ a +单数可数名词"作主语时，是第三人称单数。如：
①A horse is a useful animal.马是有用的动物。 ②This book is yours.这本书是你的。
③That car is red.那辆小汽车是红色的。 ④The cat is Lucy's.这只猫是露茜的。
4.不定代词someone, somebody, nobody, everything, something等及指示代词this, that作主语时，第三人称单数。
①Everyone is here.大家到齐了。 ②There is something wrong with the watch.这块手表有毛病。
③This is a pen.这是一支钢笔。 ④That is an eraser.那是一块橡皮擦。
5.不可数名词作主语时为第三人称单数。如： ①The milk is in the glass. ②The bread is very small.
6.当数字或字母作主语时，看作第三人称单数。如： ①"6" is a lucky number."6" ②"I" is a letter.
作业
I. 写出第三人称单数：
wash_________ match _______guess______ study______ finish_________ go________ snow______ carry_________
II. 用所给动词的适当形式填空：1. He________ TV every evening. (watch) 2. We always ________ to school on foot. (go) 3. Tom, with his classmates, often ______ football after school. (play) 4. Your shoes _______ under the bed. (be) 5. ______ here and ______ by me. (come, stand) 6. His uncle usually _________ to work by bus. (go) 7. I always ______ up at six in the morning.(get) 8. John ________ like his father. (look) 一般现在时态
一、一般现在时的用法:
1、表示经常或者反复发生的动作. 如: 我每天吃午饭. I have lunch every day.
2、还表示现在存在的一种状态. 如：我姐姐是一位老师．My sister is a teacher.
3、客观真理，客观存在，科学事实。例如：The earth moves around the sun.地球绕着太阳转。
二、一般现在时态经常与often（经常）sometimes（有时）always（总是）usually（通常）等频率词连用，也经常与every day（每天）, every week（每周）, every month（每月）, every term（每学期）, every year（每年）, once a week （一周一次），twice a year（一年两次）等表示时间的词连用。
三、第三人称单数问题
一般现在时中，当主语是第三人称单数时，即常在动词原形后加-s或-es。
四、一般现在时分类：
１．一般现在时态分为be 动词的一般现在时。
1） be动词包括am，is，are. 中文为"是"， 这三个词的用法要随着主语的变化而变化。 "am" 用于第一人称单数（I）; "is" 用于第三人称单数（he，she，it）; "are "用于第一人称复数（we），第二人称单数和复数(you), 第三人称复数（they）。 可以记住以下顺口溜： am管 "我"， is管"，她，它，他"， are管"大家"。
一般疑问句和否定句：把be 动词"am，is，are" 放在句首,回答时也要使用be动词；变为否定句时,把表示否定的not 放在 "am is are" 的后面, 其中可以简写为：is not---- isn't ；are not---- aren't；am not 没有简写形式。注意：如果are not, is not放在句尾时，不能使用简写，必须写出整个单词。.
Am I a teacher? Yes, I am. (No, I am not.) Are you his friend? Yes, you are. (No, you are not.)
Is she a nurse? Yes, she is. (No, she is not.)
否定句为：I am not a teacher. You are not his friend. She is not a nurse.
2）实义动词的一般现在时如果句子的动词不是be 动词 "am is are" 而是其他实义动词, 疑问句和否定句要借助于助动词"do"或者 "does"， 也就是说be 动词和实义动词原形不能同时使用。 这里的 "do"，"does" 本身没有什么意义，只是帮助构成疑问句和否定句. 一般疑问句读时必须用降调."do"和 "does"的使用要随着人称的变化而变化。请看下面两组句子，注意区分他们的共同点和不同点。
I go to school every day. ------------- I don't go to school every day.
He goes to school every day. ------------He doesn't go to school every day.
Do you go to school every day? -----------Does he go to school every day?
Yes, I do. (No, I don't) --------------Yes, he does. (No, he doesn't)
当主语是第三人称单数时，
肯定句为：主语+动词的s形式+宾语
否定句为：主语+助动词doesn't+动词原形+宾语
疑问句为：Does+主语+动词原形+宾语
肯定回答和否定回答也要使用助动词does.
注：1）第三人称单数用了 does 后面就不用动词的s形式了,而用动词原形.
2）变为疑问句,要在句首加"do" ; 变为否定句, 要在动词前面加"do not", 可以简写为 "don't".
课堂练习
一、把下列句子改成一般疑问句并做肯定、否定回答。
1．I usually get up at six o’clock.
?
Yes, . /No, .
2. We usually write e-mails to each other on Saturday evening.
?
3. They have the same hobby.
?
4.Suhai and Su yang like listening to music after school.
?
5.Helen usually watches TV in the evening.
?
二、用词的适当形式填空。
1.What time_________ his father_________(do) the work?
2.He _________(get) up at five o’clock.
3.__________ you _________(brush) your teeth every morning.
4.What ________ ( do ) he usually ________( do ) after school?
5.Tom ________ ( study ) English, Chinese, Maths, Science and Art at school.
6. Kitty sometimes __________(go) to the park with his sister.
7.At eight at night, she __________( watch ) TV with her parents.
8. ________ Mike________( read ) English every day?
9.How many lessons________ your classmates______( have ) on Monday?
10.We often___________ ( play ) football in the playground. |
发表于 2011-12-19 08:43:31
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