他的帮助和取得进步,都发生在说这句话之前,因此,从句和主句都是与过去事实相反的虚拟语气.
You couldn't have made such great progress in study without his help.
You couldn't have progressed so quickly in study without his help.
他的帮助和取得进步,都发生在说这句话之前,因此,从句和主句都是与过去事实相反的虚拟语气.
You couldn't have made such great progress in study without his help.
You couldn't have progressed so quickly in study without his help.