三、单词、短语和从句
单词(words)
句子的各成分在很多情况下均由单词表示,如:
(1)主语都由名词或代词充当,有时也可由数词、动名词等充当:
We are proud of our country.
Three of us are going by boat.
Smoking is prohibited.
(2)谓语都由动词或动词短语充当,有时由短语动词(phrasal verbs)表示:
We’ve been worrying about you.
We’d better take their advice.
I’ll take care of him.
(3)表语可由名词、代词、形容词等充当:
The plan sounds great.
You look charming today.
(4)宾语常由名词或代词等充当:
Give me something to read.
How many do you want? I want two.
(5)定语常由形容词和代词(又称限定词determiners)或数词充当:
Los Angeles is the second largest city in the U.S.
Three people were injured in the accident.
短语(phrases)
可以担任句子成分的短语很多,常见的有:
(1)介词短语(prepositional phrases):
We went swimming in the lake.(作状语)
He gazed at a portrait on the wall.(作定语)
She was in her early twenties.(作表语)
(2)不定式短语(infinitive phrases):
To ignore this would be a mistake.(作主语)
Her wish was to become an artist.(作表语)
They love to listen to fairy tales.(作宾语)
It’s time to go to bed.(作定语)
I’m sorry to hear it.(作状语)