专题七 情态动词和虚拟语气 ◆情态动词的考查要点 1.can,be able to 和could (1)can和be able to都表示能力,意思上没多大区别。但can只有现在和过去时,而be able to则有更多的形式。但当成功地完成某一具体动作时,通常不用could而用was/were able to来表示。这时was/were able to 相当于managed to,表示经过一番努力,终于能够完成某事。 her mother can speak french. the wounded man was still able to get to the vill