被动语态扩展情态动词和现在完成时 被动-2025-2026学年八年级英语下册语法考点精讲（教科版五四制）

八下外研版 【寒假专版】B版考点精讲 寒假专版 被动语态扩展（情态动词和现在完成时被 动) 语法专项突破 考点精讲 考点一：情态动词的被动语态基本结构及用法 规则：情态动词的被动语态结构为“情态动词+be+及物动词的过去分词”，表示“某事可能/应 该/必须被做”等含义。 例题l:(选择，外研八上期末真题改编)：Your homework一before you watch TV.A.must finish B.nust be finish C.must be finished D.must finished(答案：C) 例题2：（填空）：This problem can一(solve)easily by us.(答案：be solved) 考点二：现在完成时的被动语态基本结构及用法 规则：现在完成时的被动语态结构为“have/has+been+及物动词的过去分词”，强调动作已经完 成且对现在造成影响，主语是动作的承受者。 例题l:(选择，外研八上期末真题改编)：Many trees一in our school in the past two years.A.have planted B.have been planted C.were planted D.are planted(答案：B) 例题2：（语法填空）：Theroom一(clean)already.You can come in now.(答案：has been cleaned) 考点三：情态动词与现在完成时被动语态的混合辨析 规则：需根据语境区分情态动词被动（强调动作的可能性、必要性等）和现在完成时被动（强调 动作己完成且对现在有影响)的用法。 例题1：（选择，外研八上期末真题改编）：一Look!The classroom is so clean.-Yes.It一just now. A.must clean B.must be cleaned C.has been cleaned D.must have been cleaned (C) 例题2： 1 八下外研版 【寒假专版】B版考点精讲 考点综合训练 一、单项选择 1.The old books_to the library next week. A.must return B.must be return C.must be returned D.must returned 2.The bridge-since last year. A.has built B.has been built C.was built D.is built 3.-Why is the door open? -It_by my brother just now. A.may open B.may be opened C.has opened D.has been opened 4.These problems_by the teacher tomorrow. A.should explain B.should be explain C.should be explained D.should explained 5.A new hospital in our town in the past three years. A.has built B.has been built C.was built D.is built 二、语法填空 1.This work must_(finish)before Friday. 2.The letters_(post)already.You don't need to worry. 3.These flowers_(water)every day,or they will die. 4.The lost keys_(find)in the classroom yesterday. 5.The project_(complete)by the end of this month. 三、句型转换 l.We must clean the room before the guests arrive.(改为被动语态) The room. before the guests arrive. 2.They have built a new park in the city.(改为被动语态) A new park in the city. 3.You should send the email at once.(改为被动语态) The email_ _at once. 4.People have saved many animals from danger.(改为被动语态) Many animals from danger. 2 八下外研版 【寒假专版】 B版考点精讲 四、篇章填空 Our school library 1.-(build)in 2020.Since then,it 2.(visit)by thousands of students.Books 3. _(must return)within two weeks,or you will get a fine.Last month,a new rule 4.-(make):food and drinks 5.(not allow)in the library.Now the library 6.(keep)clean and quiet every day. 参考答案 一、单项选择 C2.B3.D4.C5.B 二、语法填空 1.be finished 2.have been posted 3.must be watered 4.were found 5.will be completed 三、句型转换 1.must be cleaned 2.has been built 3.should be sent 4.have been saved 四、篇章填空 1.was built 2.has been visited 3.must be returned 4.was made 5.are not allowed 6.is kept 3