1． 一般现在时
一般现在时的形式
是以动词的原形表示的,当主语为第三人称单数时,做谓语的动词原形后要加上词尾-s or –es,其构成方式列表如下：
情况 构成 例词
一般情况 词尾加-s Reads,writes
以ch,sh,s,x,o结尾的词 词尾加-es Teaches,washes,guesses,fixes,goes
以辅音字母+Y 结尾的词 变Y为I,再加-es Tries,carries
但是,动词to be 和to have 的一般现在时的形式特殊如下：
一般动词的词形变化 To be 的词形变化 To have 的词形变化
I know it I am a student I have a pen.
You know it.You are a student You have a pen
He (she) knows it.He (she) is a student.He (she)has a pen.
We (you,they) know it.We (you,they) are students.We (you,they) have pens.
一般现在时的功用
1.表示一直发生的事情,经常发生的动作：
Nurses look after patients in hospitals.
Excuse me,do you speak English?
I get up at 8 o’clock every morning.
It often rains in summer in Beijing.
2.表示客观事实或者真理：
Birds fly.
The earth goes around the sun.
3.谈论时间表、旅程表等,如：
What time does the film begin?
The football match starts at 8 o’clock.
Tomorrow is Thursday.
4.谈论籍贯、国籍等,如：
Where do you come from?
I come from China.你是哪国人?我是中国人.
Where do you come from?
I come from Guangzhou.你是哪里人?我是广州人.
5.询问或者引用书籍、通知或新近接到的信笺内容,如：
What does that notice say?
What does Ann say in her letter?
She says she’s coming to Beijing next week.
Shakespears says,“Neither a borrower or a lender be.”
莎士比亚说：“既不要向人借钱,也不要借钱给别人.”
现在进行时
现在进行时是由助动词to be 的现在时 + 现在分词构成：
肯定式 否定式 疑问式
I am working.You are working.He (she) is working.We (you,they) are working.I am not working.You are not working.He (she) is not working.We (you,they) are not working.Am I working?Are you working?Is he (she) working?Are we (you,they) working?
现在分词的构成,是在动词原形上加—ing,但是应该注意：
情况 变化 例词
动词以单个e 结尾 去掉e,加 ing Love _lovingArgue _ arguing
动词以 —ee结尾 直接加 ing Agree_ agreeingSee _ seeing
动词为单音节：以单一元音字母 + 单一辅音字母结尾 辅音字母双写,再加 ing Hit _ hittingRun _runningStop _ stopping
动词为双音节或者多音节：最后一个音节为重读音节,以单一元音字母 + 单一辅音字母结尾 辅音字母双写,再加 ing Be’gin be’ginningAd’mit ad’mitting
以 y 结尾的动词 直接加 ing Carry carryingEnjoy enjoying
现在进行时的功用
1） 表示说话时正在发生或者进行的动作
Please don’t make so much noise,I’m studying.
Let’s get out.It isn’t raining any more.
2) 表示在现在相对较长一段时间内正在进行的动作,但是说话一刻不一定在做的动作
Have you heard about Tom?He is building his own house.
David is teaching English and learning Chinese in Beijing.
这些动作,在说话时并不一定在发生或进行,而是在包括说话的一刹那在内的一段时间内发生、进行的.
3）表示最近的确定的安排
Ann is coming tomorrow.
Oh,is she?What time is she arriving?
At 10:15.
Are you meeting her at the station?
I can’t.I’m working tomorrow morning.
以上句子也可以用be going to (do) 的形式来表示.但是谈论已确定的安排时候,用现在进行时态显得更加自然,除非受到动词的功能的限制.在此,切不可用will,如：
Alex is getting married next month.不能用 will get married.
4) 和always 连用表示某种情绪,可能是厌烦也可能是赞扬,如：
Tom is always going away for weekends.
My husband is always doing homework.
有些动词是表示一种状态而不是动作,一般不用于进行时.例如,我们一般不说 I am knowing,而说 I know.常见的这类动词有：
want like hate know see hear believe understand seem
think(相信) suppose remember need love realize mean forget prefer have （拥有）belong
To understand is to accept.理解就是接受
Do you like Beijing?
Do you see the rainbow?
I remember him very well.
I think I understand what he wants.
一般现在时和现在进行时的比较
一般现在时表示的是一般、重复的动作或者事情
现在进行时表示说话时或说话前后正在发生的动作或事情,如：
Tom plays tennis every Sunday.
Where’s Tom?-------He is playing tennis.
What do you do?你是干什么工作的?
What are you doing here?你在这里干什么?
一般现在时是表示经久的情况,而现在进行时表示的是暂时的,如：
My parents live in Shanghai.They have been there for 50 years.
She’s living with some friends until she can find an apartment.