关于isamare的区别

isamare•is,am,are都是“是,在”的意思相同点••但是，英语中这三个单词的用法又是不同的。下面，我们来看看一些例子，看看谁能发现这个规律。Iamastudent.Myfatherisaworker.Iamateacher.Thisisacat.Itismycat.Mycatishere.Acatishere.Fourcatsarehere.例子1.表示“是”的时候，如果“是，在”（is，am，are）的前面是I的时候，就用am这个“是，在”；比如Iamastudent.2.如果“是，在”（is，am，are）的前面是单数（也就是this，it,she和单数名词）的时候，就用is这个“是，在”；比如Thisismybook.3.如果“是”（is，am，are）的前面是复数的时候，就用are这个“是，在”；Threecatsarehere.小规律Ihere.•1.is•2.am•3.are练一练Twodogshere.•1.is•2.am•3.areMyuncleadoctor.•1.is•2.am•3.areThismybrother.Mybrotherastudent.•1.is,is•2.are,is•3.am,isItmycat.Iplayingwithmycat.•1.is,is•2.are,am•3.is,amis,am,are另外的小秘密is,am,are除了有“是，在”的意思，还能帮助句子起到一个小作用！Itispayingwithaball.Iamplayingwithaball.Fourcatsareplayingwithaball.原来它们可以帮助句子表示“正在干什么”，怎么表示呢？is/am/are+动词ing而且，用is/am/are中的哪一个，就跟刚刚我们做的练习题一样。Mybrotherclimbingthetree.•1.is•2.am•3.areFourbirdssinging.•1.is•2.am•3.are翻译•我正在打篮球。•Iamplayingbasketball.•她正在唱歌。•Sheissinging.•我的姐姐正在弹钢琴。•Mysisterisplayingtheguitar.用am,is,are填空1.I______aboy.______youaboy?No,I_____not.2.Thegirl______Jack'ssister.3.Thedog_______tallandfat.4.Themanwithbigeyes_______ateacher.5.______yourbrotherintheclassroom?6.Where_____yourmother?She______athome.7.How_______yourfather?8.MikeandLiuTao______atschool.9.Whosedress______this?10.Whosesocks______they?11.That______myredskirt.12.Who______I?13.Thejeans______onthedesk.14.Here______ascarfforyou.15.Here______somesweatersforyou.16.Theblackgloves______forSuYang.17.Thispairofgloves______forYangLing.18.Thetwocupsofmilk_____forme.19.Sometea______intheglass.20.Gaoshan'sshirt_______overthere.21.Mysister'sname______Nancy.22.This______notWangFang'spencil.23.______DavidandHelenfromEngland?24.There______agirlintheroom.25.There______someapplesonthetree.26._______thereanykitesintheclassroom?27._______thereanyapplejuiceinthebottle?28.There_______somebreadontheplate.29.There_______aboy,twogirls,threemenandtenwomeninthepark.30.You,heandI______fromChina.