It is adj to do sth句型-2025-2026学年八年级英语下册语法重难点精讲（译林版）

8下译林版 【语法精讲】 It is adj.+to do sth.句型 语法精讲 【语法专题】It is adj.+to do sth.句型精讲 初中译林版八年级下册 语法精讲 语法概述：It is adj.+to do sth.句型=It(形式主语)+is+形容词+to do sth.(真正主语)，在句 中用于表达做某事具有某种性质或特征。 重难点讲解 重难点一：t作形式主语的理解与结构识别讲解： 该句型中it是形式主语，真正的主语是后面的动词不定式短语(to do sth.)。结构为”Itis+形容词 +to do sth.”,表示”做某事是…的”。形容词描述的是做某事的性质或特征，而非it本身。 例句： 。It is important to learn English well.(学好英语是重要的。)真正主语是”to learn English well',it 仅为形式上的主语，避免句子头重脚轻。 真题再现： 1.(2024江苏南京期中，译林版)一What do you think of the activity?一It is useful一us to learn team spirit. A.for B.to C.with D.of 答案：A解析：句型中形容词后接介词for表示对某人来说做某事”，us是逻辑主语， 用for符合结构要求。 2.(2023江苏苏州月考，译林版)Itis_to swim in the river alone. A.danger B.dangerous C.safely D.difficulty 答案：B解析：be动词后需接形容词作表语，dangerous是形容词，符合”Itis+adj.+todo sh”结构。 8下译林版 【语法精讲】 It is adj..+to do sth.句型 重难点二：形容词的选择与逻辑主语的表达讲解： l.形容词的选择：需根据语境选择合适的形容词，如easy,difficult,.important,.interesting等，这 些形容词多用来描述事物的性质或人的感受。 例：It is easy to answer this question..(回答这个问题很简单。) 2.逻辑主语的表达：当需要指出动作的执行者时，用介词for或of引出，结构为Itis+adj.+ for/ofsb.to do sth.”。for用于描述事物特征的形容词（如important,necessary),of用于描述 人的品质的形容词（如kind,clever)。 例：It iskind of you to help me.(你帮助我真是太好了。)(kind描述人的品质，用of) It is necessary for us to finish homework on time.(我们按时完成作业是必要的。)(necessary描 述事物特征，用for) 真题再现： 1.(2024江苏无锡期末，译林版)It is clever Tom to solve the problem so quickly. A.for B.with C.of D.to 答案：C解析：clever是描述人品质的形容词，引出逻辑主语Tom用介词of,构成'It is adj ofsb.to do sth”结构。 2.(2023 江苏常州期中，译林版)It is important_students to read more books, A.to B.for C.at D.with 答案：B解析：important是描述事物特征的形容词，引出逻辑主语students用介词for,符 合句型要求。 重难点三：否定句与疑问句结构讲解： 1.否定句：在be动词后加not,结构为'It is not+adj.+to do sth.” 例：It is not difficult to learn math.(学数学不难。) 2.疑问句：将be动词提到it前，结构为Isit+a.+to do sth.? 例：Is it interesting to watch this movie?(看这部电影有趣吗？) 真题再现： 1.(2024 江苏扬州月考，译林版)一it easy to make friends?一Yes,itis. A.Am B.Is C.Are 2 8下译林版 【语法精讲】 It is adj.+to do sth.句型 D.Do 答案：B解析：该句是一般疑问句，be动词提到it前，it是第三人称单数，用Is构成疑问 句。 2.(2023江苏南通期末，译林版)It is not to run in the hallway. A.safely B.safety C.safe D.save 答案：C解析：否定句结构为It is not+adj.+to do sth.”,形容词safe符合语法要求，意为” 在走廊跑不安全”。 易错点综合演练 L单项选择（直击重难点） 1.It is importantus to protect the environment. A.for B.of C.to D.with 2.It is to cross the road when the light is red. A.safe B.safely C.dangerous D.danger 3.it necessary to learn a foreign language? A.Am B.Is C.Are D.Do 4.It is kind you to share your toys with me. A.for B.with C.of D.to Ⅱ.用所给词的适当形式填空（强化句型结构） 1.It is not easy (finish)the work in an hour. 3 8下译林版 【语法精讲】It is adj.+to do sth.句型 2.Is it interesting(read)this storybook? 3.It is clever of him(solve)the problem. 4.It is important for students(study)hard. Ⅲ.短文填空（综合运用句型） 用括号内所给单词的适当形式填空，使短文完整通顺。 It is 1.(help)for us to learn English well.My teacher often says,"It is not 2.(difficulty)to remember new words if you read them every day."For me,it is 3.(important)to practice speaking. I think it is kind 4.(she)to help me with my pronunciation.Is it interesting 5.(learn)English?I think yes! V.连词成句（聚焦句型结构） 1.is,to,swim,in the lake,dangerous,it (. 2.for,is,necessary,exercise,us,to,every day,it (. 3.clever,of,you,to,this,idea,come up with,it,is() 4.not,is,to,late,school,for,it,good (. V.按要求改写句子（巩固否定、疑问句式） l.It is important to eat healthy food.(改为否定句) 2.It is kind of Mary to help the old man.(改为一般疑问句并作肯定回答) 3.It is necessary for them to prepare for the exam.(对划线部分提问) 4.It is interesting to watch cartoons.(改为同义句，用for children'”作逻辑主语) 综合演练参考答案 I.单项选择：1.A2.C3.B4.C Ⅱ.用所给词的适当形式填空：1.to finish2.to read3.to solve4.to study Ⅲ.短文填空： 1.helpful 2.difficult 3.important 4.ofher 5.to learn 4 8下译林版 【语法精讲】It is adj.+to do sth.句型 V.连词成句： 1.It is dangerous to swim in the lake. 2.It is necessary for us to exercise every day. 3.It is clever of you to come up with this idea 4.It is not good to be late for school. V按要求改写句子： 1.It is not important to eat healthy food. 2.Is it kind of Mary to help the old man?Yes,it is. 3.What is necessary for them to do? 4.It is interesting for children to watch cartoons. 5