情态动词 have done 表过去推测 -2025-2026学年八年级英语下册语法易错点精讲（鲁教版五四制）

初中鲁教版（五四制） 【语法精讲】8年级下册易错点突破 情态动词+have done表过去推测专项训川练 八年级下册语法易错点精讲 学段：初中教材：鲁教版（五四制）年级：8年级下册 语法认知 情态动词+have done表过去推测=情态动词(must,may,might,.could,can't等)+have+动词过 去分词，用于对过去发生的事情进行推测。 易错点讲解 易错点一：情态动词must/can/could/.may/might+have done的语气混淆 讲解： must have done表“过去一定做了某事”（肯定推测），can't have done表“过去不可能做了某 事”（否定推测），could/may/might have done表“过去可能做了某事”（可能性从高到低），注意否 定推测不可用nustn’thave done。 例句：She must have finished her homework(她一定完成作y业了)：He can'thave left(他不可能离开 了)：They might have missed the bus(他们可能错过了公交)。 真题再现： 1.(2024山东济南期中，鲁教版)一The ground is all wet.It rained heavily last night.. A.must B.can C.need D.would 答案：A解析：根据“地面全湿”推断“昨晚一定下大雨了”，表肯定推测用must have rained,. 此处省略have rained,选A。 2.(2023山东青岛期末，鲁教版)Is Tom late again?He一got up late.. -No,he missed the bus.I saw him waiting at the stop. A.must have;might have B.can have;must have C.might have;can'thave D.must have;can'thave 答案：A解析：第一空根据“迟到”推测“可能起晚了”，用might have:第二空根据“看到他 等公交”排除“不可能错过公交”，用can'thave,选A。 1 初中鲁教版（五四制） 【语法精讲】 8年级下册易错点突破 易错点二：情态动词+have done与虚拟语气的混淆 讲解： 情态动词+have done表过去推测时，强调对过去事实的判断；若表虚拟语气（本应/本可做某事却 未做)，则需用should/ought to have done(本应)、could have done(本可)、needn'thave done(本 不必)。 例句：You should have told me(你本应告诉我，却没告诉)：Ineedn’t have bought it(我本不必买， 却买了)。 真题再现： 1.(2024山东烟台月考，鲁教版)-You_told me about the meeting.I came here in a hurry. -Sorry,I thought you knew it. A.must have B.should have C.might have D.can have 答案：B解析：根据“我匆忙赶来”可知“本应被告知会议却未被告知”，表虚拟用should have told,选B。 2.(2023山东淄博期末，鲁教版)We taken a taxi to the station.The bus arrived on time,sowe missed the train. A.needn't have B.should have C.can'thave D.must have 答案：B解析：根据“公交迟到导致误火车”可知“本应打车却没打”，表虚拟用should have taken,选B。 易错点三：否定推测中can't与mustn't的误用 讲解： 表过去否定推测只能用can't have done(不可能做了)，mustn’t have done为错误表达(mustn t表“禁止”，不表推测)。 例句：He can't have stolen the money(他不可能偷了钱)：不可说He mustn't have stolen the money。 真题再现： 1.(2024山东潍坊期中，鲁教版)一Did Lucy attend the party last night? -No,she attended it.She was ill in hospital. A.mustn'thave B.can't have C.needn'thave D.shouldn't have 答案：B解析：根据“生病住院”推断“不可能参加派对”，否定推测用can't have attended,选B。 2.(2023山东泰安期末，鲁教版)一The door is locked.Tom一gone out. But he told me he would stay at home. A.can't have B.must have C.needn'thave D.should have 2 初中鲁教版（五四制） 【语法精讲】8年级下册易错点突破 答案：B解析：根据“门是锁的”推断“一定出去了”，肯定推测用must have gone,选B。 易错点综合演练 综合演练 I.单项选择（直击易错点) 1.-The exam was so easy.You scored full marks. A.must have B.can have C.need have D.would have 2.-Why didn't you answer my call?You heard it. A.must have B.should have C.might have D.can have 3.She finished the project alone.She asked for help yesterday. A.mustn't have B.can't have C.needn't have D.shouldn't have 4.-Who broke the window? -It been Tom.He was playing nearby. A.must have B.can have C.may have D.should have Ⅱ.用所给词的适当形式填空（强化易错点区分） 1.You_(call)me earlier.I waited for you for an hour 2.They(arrive)on time,but the flight was delayed. 3.He_(steal)the money.He was at home all day. 4.She looks happy.She(pass)the driving test. IIⅡ.短文填空（综合运用三大易错点） 用适当的情态动词+have done填空，使短文完整通顺： Yesterday was Lucy's birthday party,but she didn't come.I 1.-(call)her to confirm,but I forgot.Her best friend Mary said Lucy 2.(forget)the date because she mentioned it last week.However,Lucy's brother told me she was sick.She 3.(catch)a cold.I feel bad now.I4.(visit)her instead of waiting for her at the party. V连词成句（聚焦易错句式） 1.have,must,you,finished,homework,your() 2.should,you,me,told,have,truth,the (. 3.have,can't,he,the,taken,book (. 4.might,they,the,missed,train (. 3 初中鲁教版（五四制）》 【语法精讲】8年级下册易错点突破 参考答案 I单项选择 1.A2.B3.B4.C Ⅱ.用所给词的适当形式填空 1.should have called 2.could have arrived 3.can't have stolen 4.must have passed II短文填空 1.should have called 2.can't have forgotten 3.must have caught 4.should have visited V,连词成句 1.You must have finished your homework. 2.You should have told me the truth. 3.He can't have taken the book. 4.They might have missed the train.