高二新人教版英语选修7课件unit1livingwell第3课时learningaboutlanguage内容摘要:
e job. 我们认为你是最适合做这项工作的人。 ② He thought the answer(to be)interesting. 他认为这个回答很有趣。 ③ They found her(to be)an able woman. 他们发现她是个能干的女士。 4. 作表语: ① Your job today is to clean the playground. 你今天的工作是打扫操场。 ② Her wish is to go to a medical college. 她的愿望是上医学院。 [知识拓展 ] (1)动词不定式往往放在系动词 (通常是 be)的后面作表语 , 而 bee, sound, taste等系动词后面一般不接不定式作表语。 动词不定式作表语 , 往往说明主语的具体内容。 ① To Dr. Bethune, the most important thing is to save lives. 对白求恩大夫来说 , 最重要的事是挽救生命。 ② The boy39。 s wish is to bee a scientist. 男孩的愿望是成为科学家。 (2)当不定式短语作表语来解释前面从句中含有do/does/did的精确含义时 , to常省略。 ① What we need to do is reduce our use of energy and use natural forms of energy. 我们所要做的事是减少能源消耗和利用各种天然能源。 ② The only thing(that)you have to do is(to)press the button. 你所要做的唯一一件事就是按一下按钮。 5. 作定语: ① Let us give him something to eat. 让我们给他一些东西吃。 ② We have much homework to do tonight. 今晚我们有许多家庭作业要做。 ③ He has no way to protect crops. 他没有保护庄稼的方法。 [知识拓展 ] (1)动词不定式常常放在名词或不定代词的后面作后置定语 , 其逻辑主语往往是句子的主语 , 故动词不定式作定语时往往用主动式;如果动词不定式的逻辑主语不是句子的主语 , 该动词不定式要用被动式。 ① He has no place to go. 他无处可去。 ② Do you have anything to do tonight? 你今晚有什么事要做吗。 ③ I am going to Shanghai tomorrow. Do you have anything to be taken there? 明天我要去上海 , 你有什么东西要捎去吗。 (2)不定式作定语 , 往往表示尚未发生的动作 , 与所修饰的词构成动宾关系。 如果不定式的动词是不及物动词 ,则必须带有适当的介词。 ① She is a very nice person to work with. 她是个很好共事的人。 ② You must find a place for us to live in before dark. 天黑前你必须为我们找个住的地方。 6. 作状语: ① She went to the hospital to see her grandfather yesterday. 昨天她去医院看望了她爷爷。 ② I went to see my aunt only to find her out. 我去看姑姑 , 不料她出去了。 ③ He jumped with joy to hear the good news. 听到那个消息 , 他高兴得跳了起来。 ④ Mike raised his hand as if to take off his hat. 迈克举起手 , 好像要摘掉帽子。 [知识拓展 ] (1)作目的状语。 通常放在句末;为了强调目的或意义 ,也可放在句首。 They took me away from my work just to ask me some questions. 他们要我离开工作只是为了问几个问题。 (2)作结果状语。 有时采用 enough to, so...as to或 too...to这类结构。 ① What has he done to make you so happy? 他做了什么使你如此高兴。 ② His wife was so greedy as to ask for things again and again. 他妻子太贪心 , 一再地索取东西。 (3)作原因状语。 常用于 “ 主语+ be+某些形容词+动词不定式 ” 结构。 ① Nice to meet you, too. 我见到你也很高兴。 ② There is no doubt that Mrs. Li will be glad to look after the boy. 毫无疑问 , 李太太将很高兴照料这个小男孩。 Ⅱ .动词不定式的否定结构 动词不定式的否定结构由不定式形式之前加上 not而构成。 ① The teacher warned the students not to go skating on thin ice. 老师警告学生不要在薄冰上滑冰。 ② I beg you not to go there. 我恳求你别去。 ③ He was disappointed not to have been invited. 他未被邀请 , 感到很失望。 ④ Bill is said not to have been to China. 据说比尔未去过中国。 Ⅲ .带连接代词或连接副词的不定式结构 动词不定式前有时可带连接代词 what, which或连接副词 how, when, where等。 这种结构在句中。高二新人教版英语选修7课件unit1livingwell第3课时learningaboutlanguage
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