条件状语从句if unless-2025-2026学年八年级英语下册语法考点精讲（沪外版）

8下沪外版 【寒假专版】 考点精讲 寒假专版 条件状语从句(if/unless) 语法专项突破 考点精讲 考点一：f引导的条件状语从句基本用法（主将从现) 规则：f引导的条件状语从句中，主句用一般将来时，从句用一般现在时表示将来。 例题1：（选择，沪外版初中期末真题改编）：If ittomorrow,.we will stay at home.. A rain B rains C will rain Drained(答案：B) 例题2：（填空）：I_(go)shopping with you if I have time this afternoon. (答案：will go) 考点二：unless的用法及与if.not的转换 规则：unless意为“除非：如果不”，相当于if..not,引导条件状语从句时遵循“主将从现”原则。 例题1：（选择）：You will miss the bus._you hurry up. A if B unless C when D because(答案：B) 例题2：（句型转换）：If you don't study hard,you won't pass the exam.(用unless改写) you study hard,you won't pass the exam.(答案：Unless) 考点三：f引导的条件状语从句与祈使句的连用 规则：f引导的条件状语从句可与祈使句连用，结构为：祈使句+and/or+简单句（常用一般将 来时)。 例题1： (填空)：_(study)hard,and you will get good grades. (答案：Study） 例题2： 考点四：f引导的条件状语从句中情态动词的运用 规则：if条件句中，主句含有can,may,must等情态动词时，从句用一般现在时。 例题1： (选择)：If you_careful,.you may make mistakes. A aren't B won't be C don't be Dnot be(答案：A) 例题2： 1 8下沪外版 【寒假专版】 考点精讲 考点综合训练 一、单项选择 1.If she free tomorrow,she will go to the park with us. A.is B.will be C.was D.be 2.You will fail the exam-you study harder. A.if B.unless C.when D.because 3.quiet,or you may wake the baby. A.Be B.Being C.To be D.Are 4.If youearly,you can catch the first bus. A.get up B.will get up C.got up D.getting up 5.Unless it tomorrow,we will have a picnic. A.rain B.rains C.will rain D.rained 二、语法填空 1.I(visit)my grandparents if I finish my homework this weekend. 2.Ifhe(not hurry),he will miss the train. 3.(listen)to the teacher carefully,and you will understand the lesson. 4.You(not pass)the test unless you study hard. 5.If they(be)late again,the teacher will be angry. 三、句型转换 l.If you don't leave now,you will be late..(用unless改写) -you leave now,you will be late. 2.She will buy a new dress if she has enough money.(改为一般疑问句) she_a new dress if she has enough money? 3.Study hard,.and you will get good grades.(用if改写) -you study hard,you will get good grades. 4.If it rains tomorrow,.we won't go hiking.(对划线部分提问) if it rains tomorrow? 2 8下沪外版 【寒假专版】 考点精讲 四、篇章填空 Tom wants to join the school basketball team.He knows that 1.he practices every day,he 2.(not improve)his skills.His coach toldhim,"3.-(keep)trying,and you 4.-(make)progress soon."Tom also knows that unless he 5.(be)careful,he may get hurt.So he always wears his sports shoes and protective gear."IfI 6.-(work)hard enough,I 7.-(become)a good player,"Tom says to himself. 参考答案 一、单项选择 1.A2.B3.A4.A5.B 二、语法填空 1.will visit 2.doesn't hurry 3.Listen 4.won't pass 5.are 三、句型转换 1.Unless 2.Will;buy 3.If 4.What will you do 四、篇章填空 1.unless 2.won't improve 3.Keep 4.will make 5.is 6.work 7.will become