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We use “can” to talk about present ability.
We use “could” to talk about ability in the past.
3. Explanation
1) can与could
can常用于口语中, 表示非正式的请求, 请求对象一般是家人或朋友。
could是can的过去式。在口语中, could常用来代替can向对方更委婉地提出请求, 用法上比can正式, 可以用于向老师或长辈提出请求, 这时could不表示过去, 回答一般还是用can。
2) may
may也可以用来征求对方意见, 意为“可以”, 相当于could, 用法也比can更正式, 更礼貌, 一般用于向陌生人或所尊敬的人请求许可。
Step 3 Practice
1. Ask and answer the questions using “can” or “could”. Try to make dialogues in pairs.
1) _______ you speak Japanese?
2) _______ you play the piano last year?
3) _______ you cook?
4) _______ you use a computer when you were 3?
5) _______ you ride a bicycle when you were very young?
6) Miss Lin, ______ I come in?
2. Finish the activity on page 85.
Step 4 Presentation
Present the usage of “what and how to express strong feelings”.
We use What…! or How…! in a short phrase to express strong feelings about someone or something.
Step 5 Explanation
1. What引导的感叹句：
1) What + a/an + 形容词 + 可数名词单数 （+ 主语 + 谓语）!
e.g. What a lovely girl she is!
What an easy question it is!
2) What + 形容词 + 可数名词复数 （+ 主语 + 谓语）!
e.g. What interesting films they are!
3) What + 形容词 + 不可数名词 （+ 主语 + 谓语）!
e.g. What important news it is!
2. How 引导的感叹句：