彼が英語を話すのを聞いたら、彼を英国人と思うだろう。の英語

To hear him speak English, you would take him for an Englishman.

Hearing him speak English, one would take him for an Englishman.

To hear him speak English, one would take him for an Englishman.

To hear him speak English, you would mistake him for an Englishman.

To hear him speak English, you would take him for a native.

To hear him speak English, you would take him for a native.

To hear him speak English, you'd think he was [you would take him for] British.

To hear her speak English, you would take her for an Englishwoman.

To hear him speak, you'd take him for a foreigner.

To hear him speak English, you would take him for a native speaker.

To hear him speak English, you would take him for an American.

I often listened to him speak in English.

I think that he can probably speak English.

To hear him speak English, you would take him for a native.

Born in England, he speaks British English.

Everyone knows that he speaks English well.

To hear him talk, you would take him for a foreigner.

He has studied English under an Englishman.

He speaks English as well as though he were an Englishman.

He has to speak English.

He makes glaring mistakes in speaking English.

Nobody knows how much he can speak English.

He speaks English with a very proper British accent.

I have never heard him speak English.

He is superior to the rest in so far as he can speak English.

He speaks English as fluently as if he were an American.

I didn't know that he could speak English.

He needs to speak English.

He has to speak English.

He probably will be able to speak English well.