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四、按要求完成句子。
20. Get up early, or you will be late for the meeting.（改为同义句）
you get up early, you will be late for the meeting.
21. Finish your homework and you can watch TV.（改为含有条件状语从句的复合句）
you finish your homework, you TV.
22. I will be free this weekend. I will go to visit my aunt.（用if改写句子）
free this weekend, I to visit my aunt.
23. 如果明天下雨，他将待在家里。（汉译英）
tomorrow, he at home.
24. With your help, I can finish the work on time.（改为同义句）
, I can finish the work on time.
20. Get up early, or you will be late for the meeting.（改为同义句）
you get up early, you will be late for the meeting.
21. Finish your homework and you can watch TV.（改为含有条件状语从句的复合句）
you finish your homework, you TV.
22. I will be free this weekend. I will go to visit my aunt.（用if改写句子）
free this weekend, I to visit my aunt.
23. 如果明天下雨，他将待在家里。（汉译英）
tomorrow, he at home.
24. With your help, I can finish the work on time.（改为同义句）
, I can finish the work on time.
答案
20. If; don't
21. If; can watch
22. If I'm; will go
23. If it rains; will stay
24. If you help me
21. If; can watch
22. If I'm; will go
23. If it rains; will stay
24. If you help me
解析
本组题目围绕本单元核心语法if引导的条件状语从句展开，该语法遵循“主将从现”规则：即主句表达将来动作时，if引导的条件状语从句要用一般现在时表将来。同时考查“祈使句+and/or+陈述句”结构与条件状语从句的同义转换：
1. 第20题：“祈使句+or+陈述句”（表“否则”）可转换为否定含义的if条件句，表达“如果不做某事，就会出现不好的结果”。
2. 第21题：“祈使句+and+陈述句”（表顺承）可转换为肯定含义的if条件句，表达“如果做了某事，就可以做另一件事”。
3. 第22题：用if合并两个简单句，按照“主将从现”调整从句时态即可。
4. 第23题：汉译英同样遵循条件状语从句“主将从现”的规则，从句用it指代天气。
5. 第24题：将介词短语作状语的句子转换为同义的if条件句，替换“在你的帮助下”的含义即可。
1. 第20题：“祈使句+or+陈述句”（表“否则”）可转换为否定含义的if条件句，表达“如果不做某事，就会出现不好的结果”。
2. 第21题：“祈使句+and+陈述句”（表顺承）可转换为肯定含义的if条件句，表达“如果做了某事，就可以做另一件事”。
3. 第22题：用if合并两个简单句，按照“主将从现”调整从句时态即可。
4. 第23题：汉译英同样遵循条件状语从句“主将从现”的规则，从句用it指代天气。
5. 第24题：将介词短语作状语的句子转换为同义的if条件句，替换“在你的帮助下”的含义即可。
五、语法填空。
We live with them and grow up with them. They work hard, take us on 25. (excite) holidays, give us food, clothes and take good care of us. However, we often shout 26. them, make the rooms noisy and dirty and expect that they always understand and love us! 27. are those wonderful people? Of course, our parents!
It's certainly not easy 28. (be) a teenager. There are so many changes and problems as we grow up. Our 29. (body) and minds are changing fast and all the changes and problems can be scary. In fact, most of 30. answers to the problems can be found from our parents. If we get to know more about our parents, we 31. (understand) them better. We will find that 32. sometimes they are angry with us, they still love and care about us.
Take the time to stay with your parents and enjoy spending time with 33. (they): Go fishing with Dad, help Mum with housework and really talk to them. Often you will be surprised at what they tell you. This will lead to a much 34. (good) understanding and deeper（更深的）love. So let's start with something easy and see what wonderful things can follow.
We live with them and grow up with them. They work hard, take us on 25. (excite) holidays, give us food, clothes and take good care of us. However, we often shout 26. them, make the rooms noisy and dirty and expect that they always understand and love us! 27. are those wonderful people? Of course, our parents!
It's certainly not easy 28. (be) a teenager. There are so many changes and problems as we grow up. Our 29. (body) and minds are changing fast and all the changes and problems can be scary. In fact, most of 30. answers to the problems can be found from our parents. If we get to know more about our parents, we 31. (understand) them better. We will find that 32. sometimes they are angry with us, they still love and care about us.
Take the time to stay with your parents and enjoy spending time with 33. (they): Go fishing with Dad, help Mum with housework and really talk to them. Often you will be surprised at what they tell you. This will lead to a much 34. (good) understanding and deeper（更深的）love. So let's start with something easy and see what wonderful things can follow.
答案
25. exciting
26. at
27. Who
28. to be
29. bodies
30. the
31. will understand
32. though/although
33. them
34. better
26. at
27. Who
28. to be
29. bodies
30. the
31. will understand
32. though/although
33. them
34. better
解析
25. 此处修饰表示事物的名词holidays，需要将动词excite变为形容词exciting，意为“令人兴奋的”，作定语修饰holidays。
26. 考查固定搭配shout at sb.，意为“对某人大喊大叫”，填介词at。
27. 根据后一句回答"Of course, our parents!"可知此处是询问“那些很棒的人是谁”，填疑问词Who，句首首字母大写。
28. 考查固定句型It's + 形容词 + to do sth.，意为“做某事是……的”，此处填不定式to be。
29. 根据并列的minds是复数形式，以及our表示“我们的”，可知此处可数名词body要变为复数形式bodies。
30. 此处特指“这些问题的答案”，是特指的内容，填定冠词the。
31. 考查if引导的条件状语从句的“主将从现”规则，从句用一般现在时，主句要用一般将来时，填will understand。
32. 此处引导让步状语从句，表达“尽管/虽然有时候他们生我们的气，他们依然爱护和关心我们”的含义，填though/although。
33. 介词with后面要使用人称代词的宾格形式，they的宾格是them。
34. 空格前的much常用来修饰形容词比较级，且后文的deeper也提示此处用比较级，good的比较级是better。
26. 考查固定搭配shout at sb.，意为“对某人大喊大叫”，填介词at。
27. 根据后一句回答"Of course, our parents!"可知此处是询问“那些很棒的人是谁”，填疑问词Who，句首首字母大写。
28. 考查固定句型It's + 形容词 + to do sth.，意为“做某事是……的”，此处填不定式to be。
29. 根据并列的minds是复数形式，以及our表示“我们的”，可知此处可数名词body要变为复数形式bodies。
30. 此处特指“这些问题的答案”，是特指的内容，填定冠词the。
31. 考查if引导的条件状语从句的“主将从现”规则，从句用一般现在时，主句要用一般将来时，填will understand。
32. 此处引导让步状语从句，表达“尽管/虽然有时候他们生我们的气，他们依然爱护和关心我们”的含义，填though/although。
33. 介词with后面要使用人称代词的宾格形式，they的宾格是them。
34. 空格前的much常用来修饰形容词比较级，且后文的deeper也提示此处用比较级，good的比较级是better。
