(课件网) Period 4 UNIT 1 ART 主题语境 人与社会———绘画领域的代表性作品和人物 课时学案 单元语法讲练(Learning About Language) 动词不定式作表语 动词不定式是非谓语动词的一种，可以放在系动词之后作表语，通常解释或说明主语的内容，也可表示将来的动作。 一、动词不定式作表语时的位置及具体作用 1．常用在系动词后：动词不定式作表语，一般紧跟在系动词如be，seem，remain，appear，get等词的后面。 Her wish is to become a key college teacher after graduation． 她的愿望是毕业后成为一名重点大学的老师。 2．解释或说明主语的内容：常见的主语通常是wish，idea，task，purpose，duty，job，goal，aim，way等表示意向、打算、计划的词及what引导的主语从句等。 The aim is to get the hotel off the ground by 2025 and make it fully operational for travel by 2027． 这家旅馆计划在2025年建成，并在2027年全面投入运营。 What he wanted to suggest was to cut down the price and increase the sales． 他想建议的是降低价格，增加销量。 [名师点津] (1)当主语部分有what/all/everything等代词和实义动词do(表示“做”)的某种形式时，作表语的动词不定式可以不带to。 What we should do at the moment is (to) study hard． 我们现在应该做的是努力学习。 All he did at work was (to) press the button if necessary． 他工作时所做的就是必要时按下按钮。 (2)有些作表语的动词不定式，在结构上是主动的，但在意义上却是被动的。 She is to blame． 她应该受到责备。 Only one shop left now is to lent． 现在只剩下一家商铺要出租。 [即时训练1] 完成句子 ①我们的计划是下周完成这项工作。 Our plan is _____． ②我们的外教老师即将离开中国。 Our foreign teacher _____． ③最重要的是征服你自己。 The most important thing to do is _____． to finish the work next week is to leave China soon (to) conquer yourself 二、动词不定式与动词-ing形式作表语的区别 动词不定式作表语 强调的是一次性的、具体的、将要发生的动作 动词-ing形式作表语 强调的是一般性的、抽象的、经常发生的动作 His job is to paint the walls within two hours．(一次性的、具体的、目前要做的事情，并不是他日常的工作) 他的工作是两小时内粉刷这些墙。 His job is painting the walls．(是他日常的工作) 他的工作是粉刷墙。 [即时训练2] 单句语法填空 ①To do two things at a time is _____ (do) neither． ②Our aim is _____ (serve) the people heart and soul． ③Its goal is _____ (make) sure all children have a chance for education． ④Old Tom's present job is _____ (sweep) streets every day． to do serving to make sweeping 短文语境填空 My aim in life is 1．_____ (protect) the environment for future generations．My wish is 2．_____ (become) an environmental consultant after graduation．Many people think that pollution cannot 3．_____ (stop) if we want the country 4．_____ (develop)． But that is not true．What I suggest is 5．_____ (cut) back on dangerous and dirty waste from factories．Many times, factories which produce a large quantity of goods are 6．_____ (blame) for much pollution in the environment．Besides, what people should pay attention to is 7．_____ (purchase) products which can be recycled． to protect to become be stopped to develop to cut to bl ... ...
