be动词的用法一、口诀:我用am,你用are,is用在他她它,复数全用are
I______aboy
______youaboy
No,I_____not
Thegirl______Jack'ssister
Thedog_______tallandfat
jeans______onthedesk
二、有be动词的肯定句和否定句IamfromLondon
IamnotfromLondon
Heisateacher
Heisnotateacher
Sheisinthediningroom
Sheisnotinthediningroom
Myhairislong
Myhairisnotlong
Hereyesaresmall
Hereyesarenotsmall
归纳:在有be动词的句子中,改否定句时只要在be动词______加上_____
三、有be动词的一般疑问句AmIaChinese
Yes,youare
No,youaren’t
AretheyAmerican
Yes,theyare
No,theyaren’t
Isthecatfat
Yes,itis
No,itisn’t
四、Be动词在一般过去时中的变化:am--wasis--wasare--were⑴am和is在一般过去时中变为was
(wasnot=wasn’t)⑵are在一般过去时中变为were
(werenot=weren’t)⑶带有was或were的句子,其否定、疑问的变化和is,am,are一样,即否定句在was或were后加not,一般疑问句把was或were调到句首
I_______atschooljustnow
He________atthecamplastweek
We________studentstwoyearsago
They________o