二、将下列句子改写为包含宾语从句的复合句
1. Is the library open now?
→Could you tell me ?
2. Interest is the best teacher.
→I believe .
3. He would finish the report by Friday.
→He said .
4. Can they overcome the difficulties?
→I am not sure .
5. He couldn't work out the problem.
→I believed .

1. whether/if the library is open now
2. (that) interest is the best teacher
3. (that) he would finish the report by Friday
4. whether/if they can overcome the difficulties
5. (that) he couldn't work out the problem

【分析】
改写宾语从句需遵循三个核心规则：1. 确定引导词：原句为一般疑问句用whether/if，陈述句用that（可省略）；2. 调整语序：宾语从句必须用陈述语序（主语+谓语）；3. 时态呼应：根据主句时态调整从句时态（客观真理除外）。需结合每个小题的原句类型和主句特征，按规则逐步改写。
【解析】
1. 原句是一般疑问句，主句为“Could you tell me”，引导词用whether/if，将原疑问语序“Is the library open now”改为陈述语序，得到“whether/if the library is open now”；
2. 原句是陈述句，引导词用that（可省略），直接接陈述语序的原句，得到“(that) interest is the best teacher”；
3. 原句是陈述句，主句为过去时“He said”，引导词用that（可省略），保留原句过去将来时的陈述语序，得到“(that) he would finish the report by Friday”；
4. 原句是一般疑问句，主句为“I am not sure”，引导词用whether/if，将原疑问语序“Can they overcome the difficulties”改为陈述语序，得到“whether/if they can overcome the difficulties”；
5. 原句是陈述句，主句为过去时“I believed”，引导词用that（可省略），保留原句一般过去时的陈述语序，得到“(that) he couldn't work out the problem”。
【答案】
1. whether/if the library is open now
2. (that) interest is the best teacher
3. (that) he would finish the report by Friday
4. whether/if they can overcome the difficulties
5. (that) he couldn't work out the problem
【知识点】
宾语从句引导词；宾语从句陈述语序；宾语从句时态呼应
【点评】
本题为初中英语基础题型，聚焦宾语从句的核心改写规则，涵盖引导词选择、语序调整、时态呼应等必考点，是宾语从句学习的入门练习，难度较低，适合巩固基础。
【难度系数】
0.7

三、语法填空
阅读短文，在空白处填入一个适当的单词或括号内所给单词的适当形式。
Thomas Edison is one of the most famous inventors in history. It's hard to believe
1. such a great inventor struggled in school as a child. His teacher even 2. (suggest) he should give up. However, his mother strongly believed that he was a smart boy. She decided to teach him at home herself, which changed everything for Edison.
At home, Edison developed his own learning 3. (strategy). He loved to read and he would summarize the key points after reading. This learning method helped him build up his knowledge step by step. He also loved doing experiments to test his ideas. He always tried to find out 4. they were correct or not.
When people asked him 5. he felt sad about his failures, Edison would say 6. every failure taught him something new. He found many ways that didn't work, but he never stopped 7. (try). His method of learning by 8. (do) finally helped him invent a safe and inexpensive light bulb.
Edison's story shows us 9. good learning requires both effective methods and a never-give-up attitude. It doesn't matter 10. you fail at first—what matters most is that you keep trying.

1. that 2. suggested 3. strategies
4. whether 5. whether/if 6. that
7. trying 8. doing 9. that 10. whether/if

【分析】
本题为英语语法填空题，需结合句子结构、时态、固定搭配等规则填入合适单词或词形。解题思路：1. 分析从句类型（宾语从句、主语从句）确定引导词；2. 根据全文时态（一般过去时）确定动词形式；3. 依据名词的可数性确定单复数；4. 牢记固定搭配（如stop doing、by doing、whether...or not等）。
【解析】
1. 考查宾语从句引导词：it作形式主语，真正主语为that引导的从句，故填that。
2. 考查一般过去时：全文叙述爱迪生的往事，动词用过去式，suggest的过去式为suggested，故填suggested。
3. 考查名词复数：strategy为可数名词，此处指多种学习策略，用复数strategies，故填strategies。
4. 考查固定搭配：whether...or not表“是否”，为固定结构，故填whether。
5. 考查宾语从句引导词：此处表“是否”，whether/if均可引导宾语从句，故填whether/if。
6. 考查宾语从句引导词：say后接宾语从句，从句不缺成分，用that引导，故填that。
7. 考查固定搭配：stop doing sth表“停止做某事”，此处指不停止尝试，故填trying。
8. 考查介词用法：by为介词，后接动名词，故填doing。
9. 考查宾语从句引导词：shows us后接宾语从句，从句不缺成分，用that引导，故填that。
10. 考查主语从句引导词：it作形式主语，真正主语为whether/if引导的从句，表“是否”，故填whether/if。
【答案】
1. that 2. suggested 3. strategies 4. whether 5. whether/if 6. that 7. trying 8. doing 9. that 10. whether/if
【知识点】
宾语从句；动词时态；名词与固定搭配
【点评】
本题为初中英语基础语法填空题，围绕核心语法考点设置，学生掌握基础语法规则和固定搭配即可完成，难度适中。
【难度系数】
0.7