2021考博英语词汇语法题常考知识点专项练习：一般现在时
全国各院校考博英语考试题型中词汇语法题也是大多院校所考察的，考博复习冲刺阶段新东方在线考博频道为考生们整理了一系列考博英语词汇语法题常考知识点专项练习供考生们复习参考。希望大家能熟练掌握，考博成功。
基本用法
1.表示事物或人物的特征、状态。如：The sky is blue.天空是蓝色的。
2.表示经常性或习惯性的动作。如：I get up at six every day.我每天六点起床。
3.表示客观现实。如：The earth goes around the sun.地球绕着太阳转。
一般现在时常用下列副词或短语来作时间状语： often, usually, always, sometimes , seldom, every day(week, year, night), twice a month
例句: I often visit my teachers. 我经常看望我的老师。
例句: They do morning exercises every day. 他们每天做早操。
基本结构
1. be动词：主语+be(am,is,are)+其它。如：I am a boy.我是一个男孩。
2.行为动词：主语+行为动词(+其它)。如：We study English.我们学习英语。
当主语为第三人称单数(he, she,it)时，要在动词后加"-s"或"-es"。如：Mary likes Chinese.玛丽喜欢汉语。
动词变化
1. be动词的变化。
①否定句：主语+ be + not +其它。如：He is not a worker.他不是工人。
②一般疑问句：Be +主语+其它。如：-Are you a student? -Yes. I am. / No, I'm not.
③特殊疑问句：疑问词+一般疑问句。如：Where is my bike?
2.行为动词的变化。
①否定句：主语+ don't( doesn't ) +动词原形(+其它)。如：I don't like bread.
当主语为第三人称单数时，要用doesn't构成否定句。如：He doesn't often play.
②一般疑问句：Do( Does ) +主语+动词原形+其它。如：- Do you often play football? - Yes, I do. / No, I don't.
当主语为第三人称单数时，要用does构成一般疑问句。如：- Does she go to work by bike? - Yes, she does. / No, she doesn't.
③特殊疑问句：疑问词+一般疑问句。如：How does your father go to work?
变化规则
1. 一般情况下，直接加-s，如：cook-cooks, milk-milks work -> works
2. 以s. x. sh. ch. o结尾，加-es，如：guess-guesses, wash-washes, watch-watches, go-goes
3. 以“辅音字母+y”结尾，变y为i, 再加-es，如：study-studies carry -> carries
4. have -> has
专项练习
______you______the blackboard? Yes,I am.
A. Can, clean B. Am, cleaning C. Are, cleaning D. Do, clean
______ go and help her.
A. Let's me B. Let's us C. Let's D. Let's to
What are they doing? They are______things away.
A. put B. putting C. putting D. carry
Do they have a new car? Yes, ______.
A. they are B. they have C. they don't D. they do
He often ______ supper at 6:00 in the evening.
A. have B. has C. is having D. is eating
It’s 6 o’clock in the morning. He ______.
A. get up B. gets up C. is geting up D. is getting up
What are you doing? I’m ______TV.
A. watch B. watches C. to watch D. watching
We ______ any Chinese classes on Friday.
A. are having B. aren’t having C. don’t have D. are have
Tom ______ an English class now.
A. is having B. has C. having D. have
Are you playing basketball? No, we ______.
A. isn’t B. aren’t C. not D. don’t
Listen! The girl ______ in the room.
A. sings B. singing C. is singing D. are singing
The boy is ______ to his teacher.
A. saying B. speaking C. talking D. telling
I’m ______ a book in the room.
A. watching B. seeing C. reading D. looking
Where ______ he ______ from?
A. is, come B. do, come C. does, come D. is , from
What language do you ______ ?
A. say B. speak C. talk D. tell