ID: 24043464

Unit 1 Life Choices SectionⅢ Grammar —— 动词不定式课件(共45张PPT+ 学案)高中英语 北师大版(2019)必修 第一册

日期:2025-10-12 科目:英语 类型:高中课件 查看:86次 大小:612588B 来源:二一课件通
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Unit,PPT+,必修,2019,北师大,高中英语
    Section Ⅲ Grammar ——— 动词不定式 ①It’s important to meet friends in person from time to time, not just on social media. ②It’s so convenient to be able to compare the quality and prices from different online shops before I buy. ③I tend to set a goal for every subject at the beginning of each term. ④My target is to prepare myself for my degree in biology at university. ⑤My aim is to do well in every subject this term. ⑥I often use the time to review English words. ⑦To achieve all I want, I must use my time well. ⑧Li Ying is the first person to join the volunteering club in her class. ⑨My mum keeps telling me to go out with my school friends instead. 【我的发现】 1.句①、②中动词不定式短语在句中作        ,it作      。 2.句③中动词不定式短语在句中作    。 3.句④、⑤中动词不定式短语在句中作    。 4.句⑥、⑦中动词不定式短语在句中作    。 5.句⑧中动词不定式短语在句中作    。 6.句⑨中动词不定式短语在句中作     。   动词不定式是英语中动词的非谓语动词形式之一,形式上由“to+动词原形”构成,其中to是动词不定式的符号。动词不定式没有人称和数的变化,其否定形式是在to前加not。动词不定式具有动词的部分特征,可以与其后面的名词等构成动词不定式短语。在句法功能上,动词不定式(短语)与名词、形容词或副词的作用类似,在句中可作主语、表语、宾语、宾语补足语、定语、状语等成分。 一、动词不定式的三种主要结构模式 1.带to或不带to:(to) do sth (2024·1月浙江卷)So, next time you feel a bit tired, remember to stand up and stretch! 所以,下次当你感到有些疲劳时,记得站起来伸展一下! I saw a stranger enter our community. 我看见一个陌生人进了我们社区。 He told me not to move until he finished the drawing. 他告诉我在他画完画之前我不要动。 2.疑问词+动词不定式:动词+who/which/what/how/when/...+to do sth 在特定动词后,动词不定式可以和疑问词连用。这一结构在句中可用作主语、宾语或表语等,常可转换成一个由该疑问词引导的从句。 When to start has not been decided yet. 什么时候开始还没有决定。 He told us what to do.(=He told us what we should do.) 他告诉我们该做些什么。 3.动词不定式的复合结构 动词不定式的复合结构为“for/of+名词/代词(宾格)+动词不定式”,常用于“It is/was+形容词+for/of+sb+动词不定式”这一句型中。当句中的形容词修饰动词不定式时,用介词for;修饰sb时,用介词of。 It is important for him to attend every day. 他每天都要出席,这很重要。 It is kind of you to help me with my English. 你帮助我学英语真是太好了。 【即时演练1】 句型转换 ①I felt my throat tight, wondering what I should do next. →I felt my throat tight, wondering         next. ②We made him work five hours a day. →He was made       five hours a day. ③The box is so heavy that I can’t carry it. →The box is too heavy for me       . 二、动词不定式的时态和语态 动词不定式的时态和语态的形式见下表: 时态 主动 被动 意义 例句 一般式 to do to be done 动词不定式表示的动作与谓语表示的动作同时或先后发生 I’m glad to see you. 我很高兴见到你。 进行式 to be doing 谓语表示的动作(情况)发生时,动词不定式表示的动作正在进行 He pretended to be reading ... ...

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