资源介绍：全面讲述情态动词的重难点
资源看点：突出shall  should 等难点的讲解与训练

1．Can/ could/be able to（能）
表示一般现在时和一般过去时两种时态，有时也能表示将来时。所有其他时态（包括将来时）须用be able to 来表示。
①What can I do for you?
②We were sure that he could pass the test.
③Will you be able to finish the chemical experiment today?
注意事项
 1)can
表示“可能会” “偶尔会”
1.The mother can be very brave when her children are in danger
2. He can be very tactless(鲁莽的） sometimes.
3. It can be quite cold here in winter.