He and I are good firends为什么要用are?

He and I are good firends为什么要用are? He you and I are good firends.改错 -------are good firends.A.I and Tom B.Tom and I C.Tom and me Lucy's and Lily's firends are good.中文 you and i are good friends.这里为什么用are? He and I are good friends. you,he and I are good friends什么意思 该病句 I,you,and he are good children are good friends A I, you and he He and I( )good friends.(am.is .are) Tom and I are good ( )are good friends.A.He and you B.You,I and he C.She and hi