1 Combine the sentences with the conjunctions in brackets. Use correct verb forms and punctuation. 用括号中所给连词连接句子。使用正确的动词形式和标点符号。
(1) What do you do? You have a jetpack. (if)

(2) We can talk to animals. Do we understand our pets better? (if)

(3) Our fridges order food for us. There is no fresh fruit or vegetables left. (if)

(4) Many historical buildings fall down. We try our best to protect them. (unless)

(5) We are not able to live on the moon. The moon has enough oxygen for people to stay alive. (unless)

(1) What will you do if you have a jetpack?/If you have a jetpack, what will you do?
(2) Will we understand our pets better if we can talk to animals?/If we can talk to animals, will we understand our pets better?
(3) Our fridges will order food for us if there is no fresh fruit or vegetables left./If there is no fresh fruit or vegetables left, our fridges will order food for us.
(4) Many historical buildings will fall down unless we try our best to protect them./Unless we try our best to protect them, many historical buildings will fall down.
(5) We will not be able to live on the moon unless the moon has enough oxygen for people to stay alive./Unless the moon has enough oxygen for people to stay alive, we will not be able to live on the moon.

【分析】
本题要求用if和unless连接句子，需掌握条件状语从句的核心规则——“主将从现”（即主句用一般将来时，if/unless引导的从句用一般现在时表将来），同时要注意连词的位置（可放句首或句中，句首时需加逗号），以及疑问句需调整助动词位置、陈述句保持正常语序的要求，确保动词形式和标点正确。
【解析】
(1) 原句为特殊疑问句和陈述句，用if连接表将来假设：从句用一般现在时you have，主句用一般将来时will do；if可放句首或句中，得到两种正确表达。
(2) 原句为一般疑问句和陈述句，用if连接：从句用一般现在时we can talk，主句用一般将来时will understand；调整疑问句语序，if位置灵活。
(3) 原句为陈述句，用if连接：从句用一般现在时there is，主句用一般将来时will order，符合“主将从现”规则。
(4) unless相当于if not，原句为陈述句：从句用一般现在时we try，主句用一般将来时will fall；unless位置灵活。
(5) unless连接：从句用一般现在时has，主句用一般将来时will not be able，符合“主将从现”规则。
【答案】
(1) What will you do if you have a jetpack?/If you have a jetpack, what will you do?
(2) Will we understand our pets better if we can talk to animals?/If we can talk to animals, will we understand our pets better?
(3) Our fridges will order food for us if there is no fresh fruit or vegetables left./If there is no fresh fruit or vegetables left, our fridges will order food for us.
(4) Many historical buildings will fall down unless we try our best to protect them./Unless we try our best to protect them, many historical buildings will fall down.
(5) We will not be able to live on the moon unless the moon has enough oxygen for people to stay alive./Unless the moon has enough oxygen for people to stay alive, we will not be able to live on the moon.
【知识点】
条件状语从句（if/unless），一般将来时，一般现在时
【点评】
本题聚焦条件状语从句的基础应用，核心考查“主将从现”的时态规则，以及连词if、unless的正确使用和句子语序、标点的规范，是初中英语语法的基础题型，需熟练掌握时态搭配和连词位置。
【难度系数】
0.3

2 Complete the sentences with the words in brackets or your own predictions about the future. 根据括号中的词或你对未来的猜测补全句子。
(1) If Lisa (get) a chance to try a new sport next summer, she will try surfing.
(2) James (not be) able to compete in the Olympics this year unless he wins this game.
(3) The traffic will not improve unless . (more drivers/public transport/use/instead)
(4) If we stop glaciers from melting, . (not lose/polar bears/their homes)
(5) if I go to my dream university.
(6) If I have a time machine in the future, .
(7) Robots won’t totally understand humans unless .
(8) The pollution will get worse unless .

(1) gets (2) won’t be (3) more drivers use public transport instead
(4) polar bears won’t lose their homes
(Answers may vary.)
(5) I will study hard and make new friends (6) I will travel to the past
(7) they have thoughts and feelings like humans (8) we take action to reduce it

【分析】本题考查if和unless引导的真实条件状语从句的时态用法，核心规则是“主将从现”（即主句用一般将来时，if/unless引导的从句用一般现在时），部分题目为开放性表达，需结合语境合理作答。解题时先判断从句或主句的时态要求，再结合括号内词汇或语境补全内容。
【解析】
1. 第(1)题：if引导真实条件句，从句主语Lisa是第三人称单数，一般现在时谓语动词用第三人称单数形式，故填gets。
2. 第(2)题：unless相当于if not，引导条件句，主句需用一般将来时，否定形式为won’t be，故填won’t be。
3. 第(3)题：unless引导从句，用一般现在时，结合括号词汇“more drivers/public transport/use/instead”，组成完整句子more drivers use public transport instead。
4. 第(4)题：if引导从句（一般现在时），主句用一般将来时，否定形式为won’t lose，故填polar bears won’t lose their homes。
5. 第(5)题：开放性题目，主句用一般将来时，结合“去梦想大学”的语境，合理表达即可，参考答案为I will study hard and make new friends。
6. 第(6)题：开放性题目，主句用一般将来时，结合“时光机”的语境，合理表达即可，参考答案为I will travel to the past。
7. 第(7)题：unless引导从句，用一般现在时，结合“机器人理解人类”的语境，合理表达即可，参考答案为they have thoughts and feelings like humans。
8. 第(8)题：unless引导从句，用一般现在时，结合“污染变糟”的语境，合理表达即可，参考答案为we take action to reduce it。
【答案】
(1) gets (2) won’t be (3) more drivers use public transport instead (4) polar bears won’t lose their homes (5) I will study hard and make new friends (6) I will travel to the past (7) they have thoughts and feelings like humans (8) we take action to reduce it
【知识点】
条件状语从句；一般现在时；一般将来时
【点评】
本题围绕if和unless引导的真实条件句展开，既考查“主将从现”的基础语法规则，也设置开放性题目锻炼学生的语境表达能力，整体贴合初中英语语法考点，难度适中。
【难度系数】
0.6