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2024中考英语二轮复习语法专项:非谓语动词课件(42张PPT)

日期:2024-05-10 科目:英语 类型:初中课件 查看:73次 大小:398575Byte 来源:二一课件通
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2024,中考,英语,二轮,复习,语法
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(课件网) 2024中考英语二轮复习 语法专项 非谓语动词 非谓语动词是动词的一种形式。 非谓语动词在句中不能作谓语。 非谓语动词是中考考点之一。 英语里的不定式分为带to的不定式(to do)和不带to的不定式(do或动词原形)。动词不定式没有人称和数的变化。 动词不定式 一、动词不定式的构成 动词不定式的肯定式: to+动词原形。有时可以省略to。 (这里的to是不定式符号,本身无词义) 动词不定式的否定式: not + (to + )动词原形。 考点一: 作主语 作主语的动词不定式(短语)如果很短,通常位于句首; 如果较长,常用it作形式主语,而把真正的主语———动词不定式(短语)放在后面,以避免头重脚轻。 e.g. It is important for you to learn English well. 二、动词不定式的基本用法 考点一: 作主语 常用句型为:It’s + adj. + (of / for sb.) to do sth. 形容词修饰人时,表示人的品质特性、主观情感或态度的形容词(nice, kind, good, wise, polite, silly, clever, wrong, careful等)作表语时,在动词不定式前面用of引导的短语, 用来说明动作的执行者。否则还是应当用for引导的短语来表示动词不定式的逻辑主语。 e.g. It’s very nice of you to help me with the heavy box. It’s important for us to protect the environment. 考点一: 作主语 两个或两个以上的动词不定式并列时,第一个不定式带to,后面的不定式通常省略to。 e.g. To go to sleep early and get up early is a good habit. 动词不定式可作表语,说明主语的具体内容。 e.g. My work is to clean the room every day. 考点二:作表语 1. 后跟动词不定式(短语)作宾语的及物动词:agree, afford, ask, choose, decide, expect, fail, fear, help, hope, learn, manage, offer, plan, prefer, prepare, promise, refuse, want, wish等。 注意:help后跟动词不定式作宾语时,to可以省略。 e.g. Ann plans to visit Canada next year. They can’t afford to buy the beautiful clothes. He helps (to) clean the room. 考点三 :作宾语 2. 用于句型find / think it + adj. + to do sth.结构中,其中it为形式宾语,动词不定式作真正的宾语。 e.g. I find it difficult to read English stories. 3. “疑问词+动词不定式”在句中可以作宾语。 e.g. We haven’t decided when to leave. I really don’t know how to tell him about what has happened. 考点三: 作宾语 1. 一些动词后常跟动词不定式作宾语补足语,这类动词有:allow、advise、ask、call、encourage、expect、force、get、help、invite、need、order、remind、teach、tell、train、want、warn等。 注意:help跟的宾语补足语既可以是带to的动词不定式,也可以是不带to的动词不定式。 e.g. My mother encourages me to think it over carefully. I often help my mum (to) do housework. 考点四: 作宾语补足语 2. 使役动词(make, let等)及感官动词(see, feel, hear, watch, notice等)后跟动词不定式作宾语补足语时需省略to,但在变为被动语态时要加上to。 e.g. I saw a young man enter the room. She was often heard to sing this song. Someone was heard to knock at the door just now. 考点四: 作宾语补足语 1. 动词不定式(短语)作定语时,常放在所修饰词之后。 e.g. I have some clothes to wash. 2. 不及物动词的不定式作定语,与被修饰的词有逻辑上的被动关系时,不定式后面的介词通常不能省略; 不定式修饰名词time/place/way时, 其后的介词则常省略。 e.g. He is looking for a room to live in. My grandma used to have no place ... ...

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