内容正文:
Unit 4
Period 2
Grammar & Vocabulary
课 堂 学 习
to-infinitive, -ing and -ed as predicative
1
Look at the sentences from the reading passage and answer the questions.
a Every artist’s wish is to create something that expresses an idea.
b He was particularly interested in the old story about a fish jumping
through the “Dragon Gate”.
C Yang Liping’s passion is dancing.
1 Apart from nouns and adjectives, what other word forms can
serve as predicative?
2 Can “interested” in sentence (b) be replaced by “interesting”?
Why or why not?
Apart from nouns and adjectives, to-infinitive, -ing and -ed can serve as predicative.
No, it can’t. Because “interested” usually indicates a person’s interest in something while “interesting” usually indicates something making a person interested. In sentence (b), the subject is “he”, which refers to a person.
Now look for more sentences with these structures in the reading passage, and summarise their uses in your own words.
1 One way for him to find inspiration is turning to his children’s toys.
2 He is most widely known for composing music for the film...
3 To listen to Tan’s music is to experience a mix of Chinese musical
traditions and Western influences.
【语法讲解】
一、to-infinitive形式作表语
动词不定式形式作表语时表示的动作往往是具体的、一次性的动作,特别是将来的动作。通常主语是表示“目的,愿望,梦想,需求”等的名词或what引导的主语从句。例如:My purpose is to climb to the top of the snow mountain. (我的目标就是要爬到雪山的顶部。)
如果主语是主语从句,且该句中末尾是to do,则表语中的to可以省略。例如:
a. What I want to do is (to) get some fresh water.
(我要做的事就是弄些淡水来。)
b. What I need is to make them happy, not tired.
(我需要的是让他们快乐,而不是疲劳。)
二、-ing形式作表语
动词-ing形式作表语时表示一般性、习惯性的动作或抽象的动作,大部分时候主语与表语可以互换。例如:
The real question is getting to know the needs of the students. =Getting to know the needs of the students is the real question. (真正的问题是了解学生的需求。)
动词-ing形式作表语还可以表示主语具有的特征和属性。 例如:The news is really exciting. (这个消息真令人振奋。)
三、-ed形式作表语
动词-ed形式作表语时表示主语(人和事物)的被动关系或存在状态或情感情绪等。例如:
a. The cups were broken by the waitress. (杯子被服务员打碎了。)
(broken表示被动关系)
b. The