“it”的用法总结 课件-2024届高三英语一轮复习

Grammar in Unit3 -”it” 考点一 it用作代词 1. 用作人称代词 (1)My friend offered me a beautiful gift, and I like it very much. (2)What will you call it if it’s a boy? (3)-Who is waiting for you at the bus stop? -I have no idea. It may be my brother. 指前面的名词或上文提到的事 指婴儿(性别不明) 未出场的身份不明确的人 2. 用作非人称代词 1. It gets dark very early in the winter. 2. I love spring-It’s a wonderful time of the year. 4. It’s less than 100 kilometres from here to Jinan 3. It has snowed much this year. 指季节 指距离 指天气 指时间 5. It is too bad. There is much work for me to do today. 指一般的,笼统的情况 3. 指代this, that或不定代词something, nonthing. Whenever she sees something that she likes, she goes and buys it. it作形式主语. It 可以用作先行词作为句子的主语,而把句子的真正 语移到后面去, 可以移到后面的主语是:不定式、动名词、从句 不定式: e.g.知道自己的局限性是很重要的。 It is important to know your limitations. 2) 动名词: e.g.为他工作很有意思。 It is fun working for him. 3) 主语从句: e.g.他居然还活着, 真是个奇迹。 It is a wonder that he is still alive. 考点二:用作形式主语 It作形式主语时的几个常见句型: (1). It be + adj.+ (of / for sb.)+ to do sth. of 时此处 adj. 通常为描述人的属性的形容词: kind, unkind,nice ,rude,cruel,considerate,thoughtful, careful,careless等。 e.g. It's kind of you to help me with the problem. for时此处adj. 通常为描述事件的形容词:easy,difficult,hard,necessary,unnecessary,possible,impossible,likely,unlikely,right,legal,illegal,polite,impolite,clear,obvious,dangerous… e.g. It is illegal(for a teenager)to drive a car without a license. (2).It be + adj.+ doing sth.(常用的adj.有 useless, worthwhile) e.g. It is useless asking him for help. (3). It be + n.+ doing sth.(常用的名词有good, use, worth) e.g. It’s no use crying over the spilt milk. (4). It be + adj.+ that...(常用的形容词有necessary, important, vital, strange, natural, clear, possible, obvious, true,certain等) e.g. It is important that he (should)be there on time. (5). It be +done + that...(常用的过去分词有said, announced, believed, reported, known, learned, hoped, claimed, estimated等) e.g. It was said that the earthquake had caused a lot of damage. (6). It be +n.+ that...(常用的n.有pity, honour, shame, wonder, fact等) e.g. It is a pity that you