be动词、助动词、情态动词讲解(基础篇)第一讲

PAGE4be动词、助动词、情态动词讲解(基础篇)1、be动词的用法。beam/isare现在时waswere过去时单数复数英语中，be动词选用单数还是复数，要由主语来定，主语是单数，就用单数，反之用复数。◆句中含有be动词时：肯定句：主语＋be＋其他否定句：主语＋be＋not＋其他一般疑问句：Be＋主语＋其他＋？特殊疑问句：疑问词（what/who/when/where）＋be＋主语＋其他＋？Iamateacher.Youareright.Sheis16yearsold.Myfatherisathome.Thestudentsareplayinggames.Myteacherwasillyesterday.Thereisapictureonthewall.Therearetwobooksonthetable.★be动词用法歌：我用am，你用are，is连接他她它。单数名词用is，复数名词全用are。变疑问，往前提，句末问号莫丢弃；变否定，更容易，be后not莫忘记；疑问否定任你变，句首大写莫迟疑。★be动词作谓语，它后面一般跟名词、形容词或介词短语。她个子很高。她在教室里。她是一个高个子的女孩。2、助动词的用法。英语句子按正常语序是“什么人或事物”+“做什么”，即，我们常说的“主语+谓语+其他”。①主语为I或复数名词、代词时：肯定句：I/We/They/Thestudents＋动词原形＋其他＋。WewatchTVeverynight.变否定：主语＋don’t＋动词原形＋其他＋。Wedon’twatchTVeverynight.一般疑问句Do+主语+动词原形+其他+？DoyouwatchTVeverynight?Yes,wedo./No,wedon’t.特殊疑问句：疑问词+do+主语+动词原形+其他+？HowoftendoyouwatchTV?②主语为单数名词或代词时：肯定句：主语+动词第三人称单数形式+其他+。HewatchesTVeverynight.否定句：主语+doesn’t+动词原形+其他+。Hedoesn’twatchTVeverynight.一般疑问句：Does+主语+动词原形+其他+？DoeshewatchTVeverynight?Yes,hedoes./No,hedoesn’t.特殊疑问句：疑问词+does+主语+动词原形+其他+？HowoftendoeshewatchTV?★主语为单数或不可数名词，谓语要用单数第三人称，反过来，看见动词用了单数第三人称，可以推知主语是单数或不可数名词。()1.How_________yourdadhelpathome?A.doB.doesC.is()2._______goesbadeasilyinsummer.A.MilkB.ApplesC.Cakes③过去时的句式（当句子时态为过去时时，动词用过去式，不受主语单复数的影响）肯定句：主语+过去式+其他+。He/Wegotupearlyeverymorninglastyear.否定句：主语+didn’t+动词原形+其他+。He/Wedidn’tgetupearlyeverymorninglastyear.一般疑问句：Did+主语+动词原形+其他+？I.填入适当的谓语动词1.

I

___

a

boy.

____

youa

boy?

No,

I

__not.2.

The

girl______

Jack’s

sister.

3.

The

dog

______

tall

and

fat.

4.

The

man

with

big

eyes

______

a

teacher.

5.

______

your

brother

in

the

classroom?

6.

Where

____

your

mother?

She

_____

at

home.7.

How

_______

your

father?

8.

Mike

and

Liu

Tao

______

at

school.

9.

Whose

dress

______

this?

10.

Whose

socks

______

they?

11.

That

______

my

red

skirt.

12.

Who

______

I?

13.The

jeans

______

on

the

desk.

14.Here

______

a

scarf

for

you.

15.

Here

______

some

sweaters

for

you.

16.

The

black

gloves

______

for

Su

Yang.17.

This

pair

of

gloves

______

for

Jim.18.Physics_______myfavoritesubject.19.Thepolice_____runningafterthethief.20.Ourclass________goingtothezoo.ⅱ.将下列句子奇数变成否定句，偶数变疑问句。1.Ilikemusic.2.Hewalkstoschool.3.TheyoftenhaveEnglishonMonday.4.Theboysareswimmingintheriver.5.Shesmileshappily.6.Marywenttothezoolastweek.7.Theworkersmademanycarsinthefactory.8.Weshouldprotecttheinnocent.9.HerparentsflytoLondontwiceamonth.10.AllmyclassmatesclimbedtheTaiMountlastautumn.11.Theteacherasksustocleantheclassroom.12.HewillgobacktoAmericaattheendoftheyear.ⅲ.将下列句子先变成否定句