Unit1 Lesson 1 Lifestyles Grammar 动词不定式 课件 -2022-2023学年北师大版高中英语必修第一册

北师大2022高中英语必修一 Unit1 Lesson 1 Lifestyles Grammar:动词不定式 动词不定式 定义:动词不定式是一种非谓语动词形式 基本结构:to (小品词) + do (动词原形) 特点:动词不定式没有人称和数的变化,但是有时态和语态的变化。 句法功能:可在句子中充当主语、宾语、表语、定语、状语、补语等。 动词不定式 做什么成分? 1. 不定式做主语 To enter a good university is our dream. Entering a good university is our dream. Doing? To do? it作形式主语的句型有? Doing经常性 习惯性的动作 To do具体的 将来的 某一次 4 常见的it作形式主语的句型: (1)It +be +形容词+for/of sb +to do sth. (2)It +be +a+名词(pleasure/pity/pleasant thing)...to do (3)It takes sb. some time to do sth. (4) ! 特殊:“疑问词/whether+不定式”作主语/宾语/表语 How to achieve our aim is one of the problems (that) we are facing. 疑问词:what which who when where how 例:什么时候离开仍然正在讨论。 (When to leave) is still under discussion. 主语 a) 疑问词+to do know learn decide explain advise show tell forget remember wonder + what which who when where how 等 + to do 练: 1. I want to figure out how _(operate) this machine. 2. The little boy forgot when _ (hand in) his homework. to operate to hand in 2. 不定式做宾语 2. 不定式做宾语 练: 3. I didn’t know _ to do. 4. The question is how _ (put) the measure into practice. 5. He hesitated _(decide) where _(go). what to put to decide to go 区分what to do 和how to do it 8 2. 不定式做宾语 b) 及物动词+动词不定式(做宾语) afford aim agree arrange ask decide choose demand determine expect fail happen hesitate learn manage offer plan prepare promise refuse tend wait + to do 固定搭配 练:1. I happen _ (know) the answer to the question. 2. I am determined _ (study) hard so that I can pass the exam. 3. I failed _ (persuade) him to give up smoking. to know to study to persuade c)特殊句型 ——— 6123句型 主语+find/feel/think/ believe/consider/make+ it+ adj./n. +to do/doing sth./that… it:形式宾语 to do: 真正的宾语。 注doing: I find it no use/ no good/ useless/ a waste of time doing sth. I found it difficult _(focus) on my subjects. to focus 发现做某事没有好处find it no good doing sth. 10 c)特殊句型 ——— 6123句型 主语+find/feel/think/ believe/consider/make +it +adj./n.+to do/doing sth./that… 练: 1. The teacher believes it necessary _ (read) English loudly in the morning. 2. The young lady felt