一. 本周教学内容：
Unit 4 A more enjoyable school life
［教学过程］
1. 情态动词could的用法
could的否定形式是could not，多缩写为couldn't，两者通常都读作['kudnt]。
（1）表示能力，意思是：能，会。
【例】Could you speak English then？ 那时你能讲英语吗？
He said he couldn't follow me. 他说他跟不上我。
注意：①could（能）和was/were able to 都表示过去一般具有某种能力。
【例】He could (was able to) swim very well when he was nine. 他九岁时就很会游泳。
