●can/ could与 be able to用法比较 ) be able to除有一般现在时、一般过去时、一般将来 时外,还可有现在完成时、不定式、动词-ng形式等。 o This is the information Ive been able to get so far To be able to ride a bike, she practiced a lot Just being able to drive a horse, a cart isnt much help to 2) could表示过去总的、经常性的能力 was/were able to表示过去具体情况下具有的能力,并且做了某动作。 He could speak French. so he was able to show the French lady the way ●3)表示将来的能力常用 will be able to When will you be able to take us to town?⚫ ⚫ can/could 与be able to 用法比较 ⚫ 1）be able to 除有一般现在时、一般过去时、一般将来 时外，还可有现在完成时、不定式、动词-ing 形式等。 ⚫ This is the information I’ve been able to get so far. ⚫ To be able to ride a bike, she practiced a lot. ⚫ Just being able to drive a horse, a cart isn’t much help to us. ⚫ 2) could表示过去总的、经常性的能力；was/were able to 表示过去具体情况下具有的能力，并且做了某动作。 ⚫ He could speak French, so he was able to show the French lady the way. ⚫ 3) 表示将来的能力常用will be able to. ⚫ When will you be able to take us to town?