he can speak english and french为什么speak不加S?不是第三人称后加S么?

he can speak english and french为什么speak不加S?不是第三人称后加S么? He can speak english,这句是第三人称单数为什么speak不加s? he can't speak english .为什么speak不加s He can speak English and French· he can eat some foods 为什么can不加s不是第三人称单数加动词加s吗 She can speak Englist speak为什么不能加S he can speak ( )( )english ( )( )french He can speak both English and French.改为否定句 He can speak two foreign l( ) English and French I can speak English.I can also speak French.(保持句子原意) I can s he can speak english and french.(就english and french部分提问) __ He can speak English,French _____German.