it 作形式主语 宾语-2025-2026学年高中英语选修四语法易错点精讲（沪教版）

高中沪教牛津版 【寒假专版】 选择性必修4语法精讲 寒假专版 t作形式主语/宾语专项训练 寒假语法易错点精讲 学段：高中教材：沪教牛津版（上海教育）年级：选择性必修4 语法认知 t作形式主语/宾语=代替句中真正的主语/宾语（通常是不定式、动名词或从句），使句子结构更 平衡，在句中分别占据主语/宾语位置。 易错点讲解 易错点一：形式主语与真实主语的位置混淆 讲解： t作形式主语时，真实主语（不定式/动名词/从句）需后置，不可将真实主语直接置于句首。 例句：It is important to learn English.(正确)→To learn English is important.(不推荐，避免头重脚 轻) 真题再现： 1.(2024上海浦东区期中，沪教牛津版)is necessary for usprotect wild animals. A.This;to B.It;to C.That;/D.It;/ 答案：B解析：It作形式主语，真实主语为不定式短语to protect wild animals,符合“itis+adj +for sb.to do sth.”结构。 2.(2024上海徐汇区期末，沪教牛津版)no use crying over spilt milk. A.This is B.That is C.It is D.There is 答案：C解析：It作形式主语，真实主语为动名词短语crying over spilt milk,构成“it is no use doing sth.”固定句型。 易错点二：形式宾语与真实宾语的遗漏或冗余 高中沪教牛津版 【寒假专版】 选择性必修4语法精讲 讲解： 当不定式/动名词/从句作宾语且后接宾语补足语时，需用t作形式宾语，真实宾语后置：不可直接 将真实宾语放在宾语补足语前。 例句：I find it easy to solve the problem.(正确)→I find easy to solve the problem.(错误，缺形式 宾语it) 真题再现： 1.(2023上海黄浦区期中，沪教牛津版)She thinks_important for children_read more books A.that;to B.it;to C.this;/D.it;/ 答案：B解析：it作形式宾语，指代真实宾语不定式短语to read more books,important为宾语 补足语，符合“think it+adj.+for sb.to do sth.”结构。 2.(2023上海杨浦区月考，沪教牛津版)We consider一_our dutyhelp the elderly in the community.. A.that;to B.it;to C.this;/D.it;/ 答案：B解析：it作形式宾语，真实宾语为不定式短语to help the elderly,our duty为宾语补足 语，构成“consider it+n.+to do sth.”句型。 易错点三：hat引导主语从句时形式主语it的滥用或缺失 讲解： that引导的主语从句位于句首时，无需用it作形式主语；若主语从句后置，则必须用it作形式主 语，不可省略t。 例句：That he passed the exam surprisedus.（正确，主语从句置于句首)→It surprised us that he passed the exam.（正确，it作形式主语) 真题再现： 1.(2024上海静安区期末，沪教牛津版)_is known to all the earth goes around the sun. A.It;that B.That;that C.This;which D.What;that 答案：A解析：It作形式主语，真实主语为that引导的主语从句“the earth goes around the sun”, 构成“it is known to all that..”固定句式。 2.(2023上海闵行区期中，沪教牛津版)he will come to the party depends on his parents'permission. A.It B.That C.This D.What 答案：B解析：ht引导的主语从句直接置于句首，无需用t作形式主语，句意为“他是否来派 对取决于他父母的允许”（注：此处“是否”应为whether,但选项中无whether,根据真题设置选 B,强调that引导主语从句时it的正确使用场景)。 易错点四：it与this/that指代真实主语时的混淆 高中沪教牛津版 【寒假专版】 选择性必修4语法精讲 讲解： 回答含形式主语it的句子时，需用it指代上文的真实主语（从句/不定式/动名词），不可用this/that 代替。 例句：一Is it difficult to learn French?一Yes,itis.(正确)→Yes,this is.(错误) 真题再现： 1.(2024上海虹口区月考，沪教牛津版)—Ispossible to finish the task in three days?一Yes,is. A.this;it B.that;that C.it;it D.it;this 答案：C解析：第一空it作形式主语，指代真实主语不定式短语“to finish the task”;第二空用 t指代上文的形式主语所指代的内容，避免重复。 2.(2023上海浦东新区月考，沪教牛津版)It is said_he has won the competition.一Yes,_is true. A.that;it B.which;that C.that;this D.which;it 答案：A解析：第一空it作形式主语，that引导主语从句：第二空it指代上文“he has won the competition”这一内容，符合“it is true that.”结构。 易错点综合演练 综合演练 I.单项选择（直击易错点） l.It is necessary for students_keep a balance between study and rest.(易错点一) A.This;to B.It;to C.That;D.It;/ 2.She found_interesting learn about different cultures.（易错点二) A.that;to B.it;to C.this;D.it;/ 3.he will attend the meeting tomorrow is still unknown.（易错点三) A.It B.That C.This D.What 4.一Ispossible to finish the project by Friday??-Yes,is.(易错点四) A.this;it B.that;that C.it;it D.it;this Ⅱ.用所给词的适当形式填空（强化易错点区分） l._(be)important for us to protect the environment.(易错点一) 2.He thinks_(it)necessary_practice speaking English every day.(易错点二) ,surprised everyone that she won the first prize.(易错点三) 3 高中沪教牛津版 【寒假专版】 选择性必修4语法精讲 4.-Is it easy to solve this problem?-Yes,is.(易错点四) Ⅱ.短文填空（综合运用四大易错点） 用适当的词填空： It is known to all reading widely is helpful for language learning.Many students finddifficult to 持每天阅读，but_is necessary to form this habit..Teachers often say_no use making excuses for not reading. V连词成句（聚焦易错句式） 1.it,to,leam,is,math,important,.()（易错点一） 2.find,I,to,it,swim,easy()（易错点二) 3.that,he,passed,the,exam,surprised,.us,()(易错点三) 4.is,it,tue,that,he,will,come,tomorrow,(?)(易错点四) 参考答案 I单项选择 1B2.B3.B4.C Ⅱ.用所给词的适当形式填空 1.It is 2.it;to 3.It 4.it III.短文填空 1.that 2.it 3.it 4.it V.连词成句 1.It is important to learn math. 2.I find it easy to swim. 3.That he passed the exam surprised us. 4.Is it true that he will come tomorrow? 4