英語必修五知識點(diǎn)(2)
英語必修五知識點(diǎn)：過去分詞
過去分詞兼有動詞、副詞和形容詞的特征，可以帶賓語或受狀語修飾。過去分詞和賓語或狀語一起構(gòu)成過去分詞短語。它在句中可以作定語、表語、賓語補(bǔ)足語或狀語。這節(jié)課講解作定語、表語的用法。
1. 作定語
作定語的過去分詞如果是單詞，一般放在被修飾詞的前面;過去分詞短語作定語，一般放在被修飾詞的后面。例如：
There are many fallen leaves on the ground.
This is a book written by a worker.
2. 作表語
過去分詞作表語,多表示主語所處的狀態(tài)。
I was pleased at the news.
The door remained locked.
過去分詞作表語，相當(dāng)于形容詞，常見的有：delighted, disappointed, astonished, interested, satisfied, surprised, tired, worried, excited, married 等。
過去分詞作表語時，應(yīng)注意與被動結(jié)構(gòu)的區(qū)別。系表結(jié)構(gòu)說明主語的狀態(tài)或具有的性質(zhì)、特點(diǎn);被動結(jié)構(gòu)強(qiáng)調(diào)謂語動作。
The small village is surrounded by trees.(狀態(tài))
The small village was soon surrounded by enemy soldiers.(動作)
I'm interested in chess.(狀態(tài))
3. 過去分詞做狀語
?、俦頃r間，相當(dāng)于一個時間狀語從句，有時過去分詞前可加連詞 when 或 while 來強(qiáng)調(diào)時間概念。
Seen from the top of the hill, the city looked like a big garden.
Accepted by the Party, he decided to devote his life to the cause of the Party.
②表原因，相當(dāng)于一個原因狀語從句。
Exhausted, the children fell asleep at once.
Encouraged by the speech, the young people made up their minds to take up the struggle.
?、郾?xiàng)l件，相當(dāng)于一個條件狀語從句，有時過去分詞前可用 if 等詞
Heated, water changes into steam.
Given another chance, he will do better.
?、鼙碜尣?，相當(dāng)于一個though/although引導(dǎo)的讓步狀語從句。
Laughed at by many people, he continued his study.
?、荼戆殡S，說明動作發(fā)生的背景或情況。
Surrounded by a group of pupils, the old teacher walked into the classroom.
The trainer appeared, followed by five little dogs.
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