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Ⅱ. Study Past Perfect Tense in the appendix of the textbook, and fill in the blanks. Then complete the following exercises. 自学课本附录关于过去完成时的语法并总结规律，然后完成下列练习。
A) 过去完成时(Past Perfect Tense)，该时态由“助动词 had +
如：By the time she got to the bus stop, the bus had already left.
当她到达公交站牌的时候，公交车已经开走了。
B) Fill in the blanks with the given verbs in their proper forms.
用括号内所给动词的适当形式填空，必要时可加助动词 had。
1. When I got back home, my parents
2. By the end of last year, they
3. When I got to the station, the train
4. By the time he was 12 years old, he
5. When he came to see me last night, I
A) 过去完成时(Past Perfect Tense)，该时态由“助动词 had +
过去分词
”构成，表示在过去某一时间或动作之前就已经发生或完成了的动作。它表示动作发生的时间是“过去的过去
”。had not 常简略为hadn’t
。如：By the time she got to the bus stop, the bus had already left.
当她到达公交站牌的时候，公交车已经开走了。
B) Fill in the blanks with the given verbs in their proper forms.
用括号内所给动词的适当形式填空，必要时可加助动词 had。
1. When I got back home, my parents
had cooked
(cook) supper.2. By the end of last year, they
had learnt
(learn) 20 English songs.3. When I got to the station, the train
had left
(leave).4. By the time he was 12 years old, he
had written
(write) 3 books.5. When he came to see me last night, I
had finished
(finish) my homework.答案
A）过去分词；过去的过去 hadn’t B）1. had cooked 2. had learnt 3. had left 4. had written 5. had finished
