一般现在时。
定义】一般现在时表示现在经常反**生的动作、存在的状态或习惯性的动作。即描述我们日常生活中的衣食住行等活动。
用法】1) 在实际应用中，一般现在时常与以下时间状语联用：
always, usually, often, sometimes, every week (day, year, month, once a week, on sundays ……
例句：he usually plays football on sundays.
2)没有时间状语，可以分以下四种类型：, 这一类型由be动词+名词、形容词、副词、代词、数词或介词短语等一起构成谓语，表示主语的个性、特征或状态。如：
①i am a student.(主语+be动词+名词)
②they are hungry.（主语+be动词+形容词）
③he is out.(主语+be动词+副词)
④that pen is mine.(主语+be动词+代词)
⑤i am fifteen.(主语+be动词+数词)
⑥the bike is under the tree.(主语+be动词+介词短语),
do型由行为动词充当谓语，表示经常性或习惯性的动作，其构成为“[,如：
①i know it. ②he believes me.,
there be型句子表示“某地存在…”，其构成为“[,表示客观事实。用法遵循“即主语是单数或并列主语中的第一个主语是单数，则用there is；主语是复数或并列主语中的第一个主语是复数，则用there are。如：
（1）there is an eraser on the teacher's desk.(主语an eraser是单数)
（2）there is an orange，five apples and eight bananas in the bag.(并列主语中的第一个主语an orange是单数), 情态动词型句子的构成为“[,情态动词和动词原形一起构成谓语，表示说话人对所叙述的动作或状态的看法。如：
①he can speak a little english.(can+speak)
②may i h**e a book, please?(may+h**e)
练习】一、 用所给词的适当形式填空。（be动词）
1. jimbe) a hard-working student at school.
2be) tom and sam in the same class?
3. your school lifebe) very interesting.
4. therebe) a pen, two rulers and some books on the desk.
5. the boysbe) very friendly to me.
6. mariabe not) from the
7be) there any trees and a pool in the yard?
8. i want tobe) a teacher.
9. mr. wang can’tbe) at home, because the lights are off.
10. don’tbe) late for school again.
二、 用所给词的适当形式填空。（情态动词）
1. my mom cancook) food well.
2. must shestay) at home now?
3. what can the boydo) for his parents?
4. tom can’tsing) an english song.
5. he mayperform) ballet at kangkang’s birthday party.
6. she shouldhelp) her parents do some housework.
三、 用所给词的适当形式填空。（实义动词）
1. tom oftentake) a talk after supper.
2. tom and i usuallygo) to school by bike.
3. does lin taolike) reading storybooks?
4. what classes do youh**e) today?
5. how often does the girlwatch) tv?
6. where do theylive) now?
7. every year many peoplelose) their lives in traffic accidents.
8. sam doesn’tget) up early in the morning.
9. each of themh**e) a nice schoolbag.
10. they eachsleep) late at night.
四、 句型转换。（be动词）
1. she is in a blue dress.（变否定句）
shea blue dress.
2. i am from qijiang.（变一般疑问句）
from qijiang?
3. are the storybooks very interesting?（否定回答）
no4. his parents are both workers.（变一般疑问句）
his parentsworkers?
5. there are some nice books on the shelf.（对划线部分提问）
on the shelf?
五、 句型转换。（情态动词）
1. my mother may speak a little english.（变否定句）
my motherspeak a little english.
2. we should be careful when we cross the street.（变一般疑问句）
be careful when we cross the street?
3. must i finish my homework at once?（作肯定和否定回答）yesno
4. tom can recite a chinese poem.（对划线部分提问）
whattom
六、 句型转换。（实义动词）
1. they often play the piano loudly.（变否定句）
theyoftenthe piano louldy.
2. jim learns english well.（变一般疑问）
jimenglish well?
3. she likes sichuan food very much.（对划线部分提问）
whatshevery much?
4. do the boys usually play football after school?（作肯定回答）
yes5. she usually does some cooking in the evening.（变否定句）
she usuallyany cooking in the evening.
6. i want to do some shopping.（变一般疑问句）
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