(
课件网) Unit 1 FOOD MATTERS Grammar and usage ① Can you find the to-infinitives ② What is their function in the sentence Read the blog and answer the questions. App’s functions (5) _____ In the last few weeks, the author engaged in home cooking. Benefits In the past, the author liked to eat (1) _____. Why The author is eager to try new restaurants. To eat out was also a social activity to (2) _____ with friends. Then the author came across a cooking app last month. There are lots of (3) _____ to choose from. It offers (4) _____ for users to follow step by step. to cook exactly the author wants (6) _____ at the restaurant enhance the relationship recipes detailed instructions cheaper healthier Complete the following mind map. Complete the table of Part A. To-infinitives as subjects To-infinitives as predicatives To eat out was also a social activity, allowing me to enhance the relationship with my friends. When I picked a popular recipe and gave it a try, I discovered that it was not that difficult to make a simple and tasty dish. Not that long ago, my first thought at mealtimes was to eat at a restaurant. My plan is to invite my friends over at the weekend to show them my new-found skills. When the to-infinitive is used as a subject, we usually use the preparatory subject (1) at the beginning of the sentence. The to-infinitive can also be used as a predicative. It usually comes after the verb (2) . it be Working out the rules (1) To eat out was also a social activity, allowing me to enhance the relationship with my friends. (2) There are a variety of recipes on the app to choose from. (3) My plan is to invite my friends over at the weekend to show them my new-found skills. object complement attributive adverbial of purpose Work in pairs. Identify what to-infinitives function as in the following sentences from the blog. To-infinitives as subjects and predicatives ———不定式作主语和表语 很多情况下，作主语的动词不定式都可以用动名词替代，但表示某些具体情况，或表示较强烈的对比，或在某些固定说法中时，通常不用动名词替代。 To err is human. 金无足赤，人无完人。/人非圣贤，孰能无过。 To know everything is to know nothing. 样样皆通，样样稀松 1. 动词不定式作主语时，一般表示具体的或一次性的动作。作主语的不定式有时态和语态的变化，且谓语动词通常用单数。 To finish this job in one day is impossible. 要在一天之内完成这项工作是不可能的。（表示具体的情况） 2. 若不定式太长，则往往用 it 代替不定式作形式主语，不定式移至谓语之后，以使句子结构平衡。 常见句型有以下4种： (1) It +be+形容词+(for/of sb.) to do sth. (2) It+be+名词+ to do sth. (3) It takes (sb.) some time to do sth. (4) It made sb. + adj. + to do sth. It is very interesting to play in the snow in winter. 冬天在雪地里玩是很有趣的。 It is a great honour to hear you speak so highly of me. 听到你这么夸奖是我莫大的荣幸。 It takes ten years to grow trees, but a hundred years to rear people. 十年树木，百年树人。 It made me relaxed to know that I have passed ... ...
