Unit 6 Sunshine for all 重点语法：it作形式主语（三大固定句型）易错50题专练-2023-2024学年八年级英语下册重难点讲练全攻略（牛津译林版）

学校:___________姓名：___________班级：___________考号：___________ Unit 6 Sunshine for all 重点语法：it作形式主语（三大固定句型）易错50题专练 【语法重点】 1.句型A：It is + adj. + to do sth. 在该句型中，it用作形式主语，真正的主语为动词不定式to do sth., 表示“做某事是……的。” e.g. It is meaningful to help others. 帮助别人是有意义的。 注意★：动词不定式结构也可以直接置于句首作句子的主语。 e.g. It is interesting to go fishing in spring. =To go fishing in spring is interesting. 春天钓鱼真有趣。 注意★：it还可以在句型find/make/think + it + adj. + to do sth.中作形式宾语。 e.g. We think it wrong to copy classmates’ homework. 我们认为抄袭同学的作业是错误的。 2.句型B：It is + adj. + for sb. + to do sth. 在该句型中，动词不定式的逻辑主语就是for后面的人或物；形容词用来描述事物的性质，表示“对……来说做某事是……的。”此类的形容词有easy, important, possible, hard, interesting, funny, useful, strange, expensive, pleasant, simple等。 e.g. It is useful for everyone to learn computer skills. 对每个人来说，学习计算机技能是有用的。 注意★：句中的形容词是描述所做的事情, 而不是描述人； 注意★：句型It is + adj. + for sb. to do sth.有时候可以与句型It is + adj. + that从句互换。 e.g. It’s difficult for me to communicate with my parents. = It’s difficult that I communicate with my parents. 我和我的爸妈沟通起来很难。 3.句型C：It is + adj. + of sb. + to do sth. 在该句型中，介词of前的形容词描述的是人的性格、品质或特征，表示“某人做某事真是……。”此类的形容词有kind, nice, clever, polite, generous, foolish, silly, patient等。 e.g. It is wise of David to go to work by bus on rainy days. 戴维下雨天乘公交车上班，真是明智。 注意★：句型It is + adj. + of sb. + to do sth.可以与句型Sb. + is + adj. (+ enough) + to do sth.互换。 e.g. It is polite of Andy to give his seat to an old man on the bus. =Andy is polite (enough) to give his seat to an old man on the bus. 安迪在公交车上给一位老人让座，真有礼貌。 一、单项选择（每小题2分，满分100分） 1．________ is our duty to make our country better and stronger. A．It B．This C．That D．One 2．— How pleasant 　　　 is to go fishing with my father! — Yes. Parents and children should spend more time together. A．that B．he C．this D．it 3．________ is easy and convenient for us ________ some information online. A．It; to searching B．That; to search C．It; to search D．That; to searching 4．________ necessary that you hand in your homework on time every day. A．That’s B．It’s C．You’re D．T