一、主格放在动词前面做主语。 主格单数:我是I ,你是you,他是he,她是she,它是it,be动词用is,(I用am) 主格复数:我们是we,你们是you,他们是they,be动词用are(统统放在动词前。) 例如:I am a boy . She is a girl . He is a boy. You are my friend They are classmates we are friends (统统放在动词前。)!!! 二、宾格放在动词后作宾语。 宾格单数:我是me,你是you,他是him,她是her,它是it, 宾格复数:我们是us,你们是you,他们是them,(统统放在动词后。) 例如:Please help me My friend is her My friend is him Please help us Please help them (统统放在动词后。)!!! 三、形容词性物主代词后面+名词 单数:我的是my,你的是your,他的是his,她的是her,它的是its 复数:我们的是our,你们的是your,他们的是their,(后面统统要加名词。) 例如:It is my dog . It is his dog . It is her dog . It is our dog . It is their dog . It is your dog . (后面统统要加名词。)!!! 四、名词性物主代词(后面不接名词) 单数:我的是mine,你的是yours,他的是his,她的是hers, 复数:我们的ours,你们的yours,他们的theirs.(后面不接名词) 例如:The dog is mine The dog is his The dog is hers The dog is ours The dog is yours The dog is theirs (后面不接名词)!!! 本文来源:https://www.wddqw.com/doc/387cd697854769eae009581b6bd97f192379bf1a.html