Ⅲ. Combine the two sentences with “when&while”.
1. The volcano erupted. /Tourists were taking photos.

2. The lightning struck. /They were playing basketball.

3. The wind was blowing strongly. /The tree fell down.

4. The fire was spreading. /People were running away.

5. The fire started. /Everyone ran out of the building.

6. The students were having a science class. /The tornado warning sounded.

1. When the volcano erupted, tourists were taking photos. /Tourists were taking photos when the volcano erupted.
2. When the lightning struck, they were playing basketball. /They were playing basketball when the lightning struck.
3. While/When the wind was blowing strongly, the tree fell down.
4. While the fire was spreading, people were running away.
5. When the fire started, everyone ran out of the building.
6. The students were having a science class when the tornado warning sounded.

【分析】首先明确when和while引导时间状语从句的用法：when可搭配短暂性动词（瞬间发生的动作）或延续性动词（持续进行的动作），从句可置于句首或主句后；while通常搭配延续性动词，强调主句动作在从句动作进行时发生。解题时先判断每组句子中动词的类型（短暂/延续），再选择合适的连接词，调整语序即可。
【解析】1. 第一组中，erupted是短暂性动词，taking photos是延续性动词，用when连接，两种语序均正确；2. 第二组中，struck是短暂性动词，playing是延续性动词，同第一组逻辑；3. 第三组中，blowing是延续性动词，fell是短暂性动词，可用while或when连接；4. 第四组中，spreading和running均为延续性动词，用while连接；5. 第五组中，started和ran out均为短暂性动词，用when连接；6. 第六组中，having是延续性动词，sounded是短暂性动词，用when连接，调整为延续动作在前、瞬间动作在后的语序。
【答案】1. When the volcano erupted, tourists were taking photos. /Tourists were taking photos when the volcano erupted.
2. When the lightning struck, they were playing basketball. /They were playing basketball when the lightning struck.
3. While/When the wind was blowing strongly, the tree fell down.
4. While the fire was spreading, people were running away.
5. When the fire started, everyone ran out of the building.
6. The students were having a science class when the tornado warning sounded.
【知识点】时间状语从句（when/while用法）
【点评】本题考查when和while引导时间状语从句的基础用法，核心是区分短暂性与延续性动词的搭配，是初中英语语法的常考基础题型，难度适中。
【难度系数】0.6

Ⅳ. Complete the sentences according to the requirements.
1. I read a book written by Lu Xun last summer. (用 at this time yesterday 替换 last summer)
I a book written by Lu Xun at this time yesterday.
2. They do eye exercises every day. (用 at 9 o'clock yesterday 替换 every day)
They eye exercises at 9 o'clock yesterday.
3. We were having a PE class at four yesterday afternoon. (改为否定句)
We a PE class at four yesterday afternoon.
4. Kate was reviewing her lessons at eight last night. (改为一般疑问句,做肯定回答)
Kate her lessons at eight last night? , she .
5. They were playing computer games at nine last night. (对画线部分提问)
they computer games?
6. Tom was watching TV at eight o'clock last night. (对画线部分提问)
Tom at eight o'clock last night?

1. was reading
2. were doing
3. weren't having
4. Was, reviewing, Yes, was
5. When were, playing
6. What was, doing

【分析】
本题主要考查过去进行时的运用及句式变换，解题思路如下：首先明确过去进行时的结构为“was/were + 动词现在分词（doing）”，用于表示过去某一时刻正在进行的动作；再根据各题的时间状语要求、句式要求（否定、疑问、划线提问），结合主语的单复数确定be动词形式，最后完成填空。
【解析】
1. 时间状语替换为“at this time yesterday”（过去具体时刻），需用过去进行时；主语为I，be动词用was，read的现在分词是reading，故填was reading。
2. 时间状语替换为“at 9 o'clock yesterday”（过去具体时刻），用过去进行时；主语为they，be动词用were，do的现在分词是doing，故填were doing。
3. 过去进行时的否定句需在be动词后加not，were not缩写为weren't，故填weren't having。
4. 过去进行时的一般疑问句需将be动词was提前，其他部分不变；肯定回答结构为“Yes, 主语+was/were”，故依次填Was, reviewing, Yes, was。
5. 划线部分为时间状语，用疑问词When提问；主语为they，be动词用were，剩余部分playing照抄，故填When were, playing。
6. 划线部分为动作内容，用疑问词What提问；主语Tom为第三人称单数，be动词用was，剩余部分doing照抄，故填What was, doing。
【答案】
1. was reading
2. were doing
3. weren't having
4. Was, reviewing, Yes, was
5. When were, playing
6. What was, doing
【知识点】
过去进行时、英语句型转换
【点评】
本题围绕过去进行时的核心考点设置，涵盖时态结构识别、不同句式（否定句、一般疑问句、特殊疑问句）的转换，是初中英语时态模块的基础练习，旨在巩固过去进行时的用法规则。
【难度系数】
0.3