She can speak Englist speak为什么不能加S

She can speak Englist speak为什么不能加S he can't speak english .为什么speak不加s He can speak english,这句是第三人称单数为什么speak不加s? he can speak english and french为什么speak不加S?不是第三人称后加S么? 为什么Mrs li can speak English中的speak后不加s she can speak( )English she can speak ( )Chinese what languages does she speak?这里的languege为什么要加"s" She can speak English; she can speak French,too. i can't speak any word 我想说WORD为什么不加S She can't speak Chinese.It's very( )for her. She can speak English______(good)