本资料来自专辑：2025-2026学年八年级英语上册单元重难点易错题精练（人教版新教材）
2025-2026学年八年级英语上册单元重难点易错题精练
Unit 8 Let’s Communicate!
语法Grammar If引导的条件状语从句
一、单项选择(本大题共30小题，每小题2分，共60分)
1．—I wonder if Sally ________ us prepare the party?
—I’m sure she will if she ________ time．
A．will help; has B．helps; will have C．will help; will have
2．—We ________ to school if it doesn’t rain tomorrow．
—I agree with you． Walking is good exercise．
A．walk B．walked C．will walk
3．Fu Xing will go to the science museum with us ________ she is free tomorrow．
A．before B．after C．if D．although
4．We ________ behind others if we don’t work hard at our subjects at school．
A．will fall B．fell C．are falling D．have fallen
5．You will learn English well _________ you often use it．
A．if B．unless C．and D．but
6．—I’m thinking about going to the beach tomorrow．
—That’s a good idea． You’ll have fun ______ it doesn’t rain．
A．though B．until C．if D．since
7．—This book seems a little boring．
—You will enjoy it _________ you put your heart into it．
A．unless B．if C．although
8．We can have a wonderful future ______ we work hard．
A．although B．because C．if D．so
9．—What’s your plan for this Sunday?
—If it ______ rain, we ______ fishing．
A．doesn’t; will go B．won’t; will go C．isn’t; will go
10．—What will you do this Saturday, Tony?
—I will go fishing with my friends if it ________ rain tomorrow．
A．doesn’t B．don’t C．won’t
11．—What about going camping in the mountains together if it ________ next Sunday?
—Sounds like a good idea．
A．won’t rain B．isn’t rain C．doesn’t rain
12．—Lily, ________ you are free after school, let’s go to the shop and buy a gift for your father．
—OK, Lucy． Tomorrow is my father’s birthday． I almost forgot it．
A．until B．if C．unless D．but
13．We will go camping if it ________ tomorrow．
A．won’t rain B．didn’t rain C．isn’t raining D．doesn’t rain
14．—Happiness is about having each tiny wish come true．
—________we work hard, we’ll make our life full of happiness．
A．If B．Unless C．Though D．Whether
15．—If you ________ after 6:30 tomorrow morning, you ________ the train．
—Could you wake me up at 6:00?
A．get up; will miss B．will get up; miss C．get up; miss
16．Never give up． Nothing is difficult ________ you put your heart into it．
A．if B．though C．that D．so
17．—Labor education is important for students．
—I agree． ________ schools put it into practice, students will be more independent and helpful．
A．Because B．Until C．If D．Though
18．________ you see a bottle on the ground, please pick it up and put it in the bin．
A．If B．So C．But D．Before
19．—Mum, can I help you clean the house?
— Of course, ________ you would like to．
A．because B．but C．till D．if
20．—What will we do ________ it rains tomorrow?
—We can stay at home and watch TV．
A．because B．so C．if D．but
21．We can have a wonderful future ________ we work hard．
A．if B．unless C．so D．although
22．—We will certainly go to a good high school ________ we study hard．
—Yes． Hope our dream will come true．
A．unless B．if C．when D．since
23．If he ________ us, we will finish the work more quickly．
A．helps B．will help C．is helping D．helped
24．—What are you watching through the window?
—The rain． I’m going to the school library ________ it stops．
A．before B．because C．until D．if
25．— Do you know when Mr． Li will meet us tomorrow?
— Sorry, I don’t know now, but I’ll tell you if he ________．
A．arrive B．reaches C．get D．arrives
26．—I failed again! I feel very upset．
—Don’t lose heart． If you ________ going, you will make it finally!
A．keep B．kept C．will keep D．are keeping
27．If you do one thing at a time and stick to your plan, you ________ some day．
A．will succeed B．succeed C．succeeded D．have succeeded
28．—Would you like to help me clean the house this weekend?
—I’d like to ________ I finish my homework．
A．before B．though C．if D．unless
29．Some people think they may talk to others _________ they have problems．
A．though B．so C．if D．until
30．________ you use your dictionary often, your spelling will improve．
A．Whether B．If C．Though D．Unless
二、完成句子(本大题共10小题，每小题4分，共40分)
31．Unless we talk to someone, we’ll certainly feel worse． (改为同义句)
________ we________ talk to someone, we’ll certainly feel worse．
32．Don’t play on the street, or you will be in danger． (改为同义句)
________ you ________ on the street, you will be in danger．
33．如果你放弃，你就会落后。
You ________ fall behind________you give up．
34．如果你需要帮助，我会尽全力帮你的。
________you need help, I________try my best to help you．
35．Unless we talk to someone, we’ll certainly feel worse． (改成同义句)
________we________ talk to anyone, we’ll certainly feel worse．
36．如果明天下雨，我就待在家。
________ it________ tomorrow, I will stay at home．
37．如果迈克接受我的意见，他将得到这份工作。
Mike ________get this job ________ he accepts my advice．
38．想要到达中心大街，你必须乘坐公交车。
________ Center Street, you have to take a bus．
39．如果你能保密，我会告诉你关于他的一切。
If you ________________, I________________．
40．如果Sandy能使其他人开心，她将会很高兴。
Sandy ________ happy ________．
…………
参考答案
1．A
【详解】句意：——我想知道Sally是否会帮我们准备聚会？——如果她有时间，我相信她会的。
考查动词时态。根据“I wonder if Sally ．．． us prepare the party?”可知，句子为宾语从句，主句是一般现在时，从句用所需的任意时态，结合语境分析可知，“准备聚会”这件事还没发生，因此用一般将来时will do；根据“she will if she ．．． time．”可知，该句是if引导的条件状语从句，遵循“主将从现”原则，从句用一般现在时，主语是she，动词用三单。故选A。
2．C
【详解】句意：——如果明天不下雨，我们就步行去学校。——我同意你的观点。散步是很好的锻炼方式。
考查条件状语从句的主将从现。walk步行，一般现在时；walked不行，一般过去时；will walk将会步行，一般将来时。根据“We．．．to school if it doesn’t rain tomorrow．”可知，if引导条件状语从句，从句“it doesn’t rain tomorrow”为一般现在时，因此主句用一般将来时。故选C。
…………
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