Having experienced quite a few earthquakes in Hawaii already, I didn't take much notice.

Having + past participle (the perfect -ing form) to refer to an action that took place before the time expressed by main verb.

4. Read and discuss Exercise 1 in the SB

5. Set Exercise 2. check answers and discuss structures.

6. Set Exercise 3,4 and 5. check answers after each exercise and discuss reasons for

the structures used.

7. 小结-ing 形式的用法

1) -ing 形式作状语

用法 例句 时间 Walking along the street, I met Mary. (= While I was walking along the street....)在街上走的时候，我遇到了玛丽。 条件 Turning to the left, you will find the school. (= If you turn to the left, ....)向左走，你就会找到那个学校 让步 Knowing where I live, he never come to see me .(= Though he knows where I

live, ....)尽管他知道我的住处，但从不来看我。 伴随 I stood there, waiting for her. (= ..., and waited for her.)我站在那儿等她