条件状语从句if unless-2025-2026学年八年级英语下册语法直击真题精讲(北师大版)
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教辅
内容正文:
8下北师大版
【寒假专版】
E版直击真题精讲
寒假专版
【语法专项】条件状语从句
(if/unless)
真题精讲与演练
直击真题高效讲
真题一:单项选择(if/mnless用法辨析)
(2024北京海淀期中,北师大版)
You will miss the bus you hurry up.
A.if
B.unless
C.when
D.because
答案:B
核心知识点:
unless意为“除非;如果不”,相当于if.not,引导条件状语从句时,主句常用一般将来时,从句
用一般现在时。
解析:句意为“你会错过公交车,除非你快点”,即“如果不快点就会错过”,用unless符合逻辑。
真题二:单项选择(时态搭配)
(2023陕西西安月考,北师大版)
If it tomorrow,we a picnic in the park.
A.rains;won't have
B.will rain;don't have
C.rains;don't have
D.will rain;won't have
答案:A
核心知识点:
f引导条件状语从句时,遵循“主将从现”原则:主句用一般将来时(w+动词原形),从句用
般现在时表将来。
解析:从句“明天下雨”用一般现在时rains,.主句“不会去野餐”用一般将来时won't have,.符合
“主将从现”。
8下北师大版
【寒假专版】
E版直击真题精讲
真题三:用所给词的适当形式填空(if/unless句式)
(2024广东广州期末,北师大版)
If she(study)hard,she(pass)the exam.
You_(not finish)the work on time unless you(ask)for help.
答案:1.studies;will pass2.won't finish;ask
核心知识点:
if/unless从句用一般现在时(主语三单动词加-s),主句用一般将来时(will+动词原形):否定句
在will后加not,缩写为won't。
解析:
第一句:if从句“努力学习”用studies,.主句“会通过考试”用will pass:
第二句:unless从句“求助”用ask,主句“不能完成工作”用won't finish。
真题四:句型转换(改写为nless句式)
(2023江苏南京期中,北师大版)
按要求改写句子,每空一词。
If you don't wear warm clothes,.you will catch a cold.(用unless改写)
_you wear warm clothes,you will catch a cold.
答案:Unless
核心知识点:
unless可替换if.not,两者意思相同,改写时去掉f和not,保留主句和从句内容。
解析:原句“如果不穿厚衣服会感冒”,用unless改写为“除非穿厚衣服,否则会感冒”,直接用
Unless引导从句。
真题五:短文填空(语境综合运用)
(2024四川成都月考,北师大版)
阅读短文,用f或unless的适当形式填空,使短文通顺。
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,"You 3.(make)progress unless you give up."So Tom practices
two hours a day.He believes that 4.he keeps trying,he 5.(become)a good player soon.
答案:1.unless2.won't improve3.will make4.if5.will become
核心知识点:
if表“如果”(肯定条件),unless表“除非”(否定条件),均需遵循“主将从现”原则:在语境中
根据句意选择是否定还是肯定条件。
解析:
1.句意为“除非每天练习,否则不会提升技能”,用unless:
2.主句“不会提升”用won't improve(主将):
3.“除非放弃,否则会进步”,肯定主句用will make:
4.“如果坚持尝试”,肯定条件用f:
5.主句“会成为好球员”用will become(主将)。
2
8下北师大版
【寒假专版】E版直击真题精讲
真题综合演练
真题综合演练
1单项选择
1.-We will have a picnic this weekend it rains.
-That sounds great!
A.if
B.unless
C.when
D.because
2.If you carefully,you the answer.
A.listen;will find
B.will listen;find
C.listen:find
D.will listen:will find
Ⅱ.用所给词的适当形式填空
1.He(not pass)the test unless he(study)harder.
2.If it(snow)tomorrow,we(make)a snowman.
Ⅲ句型转换
l.You will be late for school if you don't get up early..(用unless改写)
2.They can finish the project on time if they work together..(改为否定句)
V.短文填空
Peter wants to be a doctor.He knows that 1.he studies medicine in college,he 2.(not become)
a doctor.His parents tell him,"You 3.(achieve)your dream unless you lose heart."So Peter studies
very hard every day.He believes that 4.he keeps working hard,he 5.(realize)his dream one day.
综合演练参考答案
I单项选择
(答案缺失)
3
8下北师大版
【寒假专版】E版直击真题精讲
Ⅱ.用所给词的适当形式填空
(答案缺失)
Ⅲ.句型转换
(答案缺失)
V.短文填空
(答案缺失)
4
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