二、句型转换
1. Simon plays football every day. (用at the moment改写句子)
Simon .
2. I always go to school at 7:00 in the morning. (用last year改写句子)
I always .
3. Lucy was dancing. Lily was singing. (用while连接句子)
Lucy .
4. I bought a new bicycle the day before yesterday. (用for three days改写句子)
I .
5. The scientist passed away over six years ago. (用for over six years改写句子)
The scientist .
1. Simon plays football every day. (用at the moment改写句子)
Simon .
2. I always go to school at 7:00 in the morning. (用last year改写句子)
I always .
3. Lucy was dancing. Lily was singing. (用while连接句子)
Lucy .
4. I bought a new bicycle the day before yesterday. (用for three days改写句子)
I .
5. The scientist passed away over six years ago. (用for over six years改写句子)
The scientist .
答案：1. is playing football at the moment
2. went to school at 7:00 in the morning last year
3. was dancing while Lily was singing
4. have had a new bicycle for three days
5. has been dead for over six years
2. went to school at 7:00 in the morning last year
3. was dancing while Lily was singing
4. have had a new bicycle for three days
5. has been dead for over six years
解析：
1. 考点为现在进行时的运用，"at the moment"表示此刻，需将一般现在时的句子改为现在进行时，结构为"am/is/are + 动词现在分词"，Simon为第三人称单数，be动词用is，play的现在分词是playing。
2. 考点为一般过去时的运用，"last year"是过去时间标志，需将一般现在时改为一般过去时，go的过去式为went。
3. 考点为while引导时间状语从句的用法，while常连接两个过去进行时的动作，表同时发生，将两个过去进行时的句子用while连接即可。
4. 考点为现在完成时中延续性动词的转换，"for three days"是时间段，需将一般过去时改为现在完成时，buy是短暂性动词，要换成延续性动词have，现在完成时结构为"have/has + 动词过去分词"，主语I用have，have的过去分词是had。
5. 考点为现在完成时中延续性表达的转换，"for over six years"是时间段，需将一般过去时改为现在完成时，pass away是短暂性动词，要换成延续性表达be dead，主语The scientist是第三人称单数，助动词用has。
2. 考点为一般过去时的运用，"last year"是过去时间标志，需将一般现在时改为一般过去时，go的过去式为went。
3. 考点为while引导时间状语从句的用法，while常连接两个过去进行时的动作，表同时发生，将两个过去进行时的句子用while连接即可。
4. 考点为现在完成时中延续性动词的转换，"for three days"是时间段，需将一般过去时改为现在完成时，buy是短暂性动词，要换成延续性动词have，现在完成时结构为"have/has + 动词过去分词"，主语I用have，have的过去分词是had。
5. 考点为现在完成时中延续性表达的转换，"for over six years"是时间段，需将一般过去时改为现在完成时，pass away是短暂性动词，要换成延续性表达be dead，主语The scientist是第三人称单数，助动词用has。
三、根据汉语意思完成句子
1. 埃米整个晚上都在她房间里练习弹钢琴。
Amy in her room the whole night.
2. 凯文已经在电话里和他的姑姑谈了半个小时。
Kevin .
3. 在过去，人们常常手洗衣服。
In the past, people .
4. 许多现代的发明已经在我们的生活中起到了重大的作用。
Many in our life.
5. 新鲜的食物在夏天过几个小时就会变坏。
In summer, fresh food would .
6. 现在飞机已经使得旅行更加快捷舒服。
Now planes .
7. 今天上午桑迪参加了一个写作比赛。
Sandy a writing competition this morning.
8. 爸爸正在网上搜索关于这篇文章的信息。
Dad is the passage .
1. 埃米整个晚上都在她房间里练习弹钢琴。
Amy in her room the whole night.
2. 凯文已经在电话里和他的姑姑谈了半个小时。
Kevin .
3. 在过去，人们常常手洗衣服。
In the past, people .
4. 许多现代的发明已经在我们的生活中起到了重大的作用。
Many in our life.
5. 新鲜的食物在夏天过几个小时就会变坏。
In summer, fresh food would .
6. 现在飞机已经使得旅行更加快捷舒服。
Now planes .
7. 今天上午桑迪参加了一个写作比赛。
Sandy a writing competition this morning.
8. 爸爸正在网上搜索关于这篇文章的信息。
Dad is the passage .
答案：1. has been practising playing the piano
2. has talked with his aunt on the phone for half an hour
3. used to wash clothes by hand
4. modern inventions have played an important part/role
5. go bad in a few hours
6. have made travel faster and more comfortable
7. took part in/joined in
8. searching for information about; on the Internet
2. has talked with his aunt on the phone for half an hour
3. used to wash clothes by hand
4. modern inventions have played an important part/role
5. go bad in a few hours
6. have made travel faster and more comfortable
7. took part in/joined in
8. searching for information about; on the Internet
解析：
1. 考查现在完成进行时，强调动作从过去持续到现在，“练习弹钢琴”用固定搭配practise playing the piano，主语Amy是第三人称单数，故用has been practising playing the piano。
2. 考查现在完成时，“和某人谈话”用talk with sb.，“在电话里”用on the phone，“持续半个小时”用for half an hour，主语Kevin是第三人称单数，故用has talked with his aunt on the phone for half an hour。
3. 考查used to do结构，该结构表示过去常常做某事，“手洗衣服”用wash clothes by hand，故填used to wash clothes by hand。
4. 考查现在完成时，“现代发明”是modern inventions，“在……中起到重大作用”用固定短语play an important part/role in，主语为复数，故填modern inventions have played an important part/role。
5. 考查固定短语，“变坏”用go bad，“过几个小时”用in a few hours，故填go bad in a few hours。
6. 考查现在完成时，“使……变得……”用make sth.+形容词比较级结构，“更加快捷舒服”是faster and more comfortable，主语planes是复数，故填have made travel faster and more comfortable。
7. 考查一般过去时，“参加（比赛类活动）”用take part in/join in，根据时间状语“this morning”用过去式，故填took part in/joined in。
8. 考查现在进行时和固定短语，“搜索关于……的信息”用search for information about，“在网上”用on the Internet，故填searching for information about; on the Internet。
2. 考查现在完成时，“和某人谈话”用talk with sb.，“在电话里”用on the phone，“持续半个小时”用for half an hour，主语Kevin是第三人称单数，故用has talked with his aunt on the phone for half an hour。
3. 考查used to do结构，该结构表示过去常常做某事，“手洗衣服”用wash clothes by hand，故填used to wash clothes by hand。
4. 考查现在完成时，“现代发明”是modern inventions，“在……中起到重大作用”用固定短语play an important part/role in，主语为复数，故填modern inventions have played an important part/role。
5. 考查固定短语，“变坏”用go bad，“过几个小时”用in a few hours，故填go bad in a few hours。
6. 考查现在完成时，“使……变得……”用make sth.+形容词比较级结构，“更加快捷舒服”是faster and more comfortable，主语planes是复数，故填have made travel faster and more comfortable。
7. 考查一般过去时，“参加（比赛类活动）”用take part in/join in，根据时间状语“this morning”用过去式，故填took part in/joined in。
8. 考查现在进行时和固定短语，“搜索关于……的信息”用search for information about，“在网上”用on the Internet，故填searching for information about; on the Internet。
四、用括号中所给动词的正确时态填空，完成短文
Many centuries ago, people were afraid of comets (彗星) because they $^{(1)}$ (not understand) them. People $^{(2)}$ (think) comets a sign of bad luck. Thanks to scientists, so far people $^{(3)}$ (learn) about what comets truly are. A comet $^{(4)}$ (be) a big ball of ice and dust. One famous comet is Halley's Comet (哈雷彗星), which $^{(5)}$ (come) round every 75 or 76 years. It is named after English astronomer (天文学家) Edmond Halley, who first predicted (预测) the comet's return. He was right. It last $^{(6)}$ (appear) in the solar system (太阳系) in 1986 and $^{(7)}$ (return) again sometime in 2061.
Comets are fun to look at, and they are also very important. Now scientists $^{(8)}$ (make) further studies on comets to better understand our universe (宇宙).
Many centuries ago, people were afraid of comets (彗星) because they $^{(1)}$ (not understand) them. People $^{(2)}$ (think) comets a sign of bad luck. Thanks to scientists, so far people $^{(3)}$ (learn) about what comets truly are. A comet $^{(4)}$ (be) a big ball of ice and dust. One famous comet is Halley's Comet (哈雷彗星), which $^{(5)}$ (come) round every 75 or 76 years. It is named after English astronomer (天文学家) Edmond Halley, who first predicted (预测) the comet's return. He was right. It last $^{(6)}$ (appear) in the solar system (太阳系) in 1986 and $^{(7)}$ (return) again sometime in 2061.
Comets are fun to look at, and they are also very important. Now scientists $^{(8)}$ (make) further studies on comets to better understand our universe (宇宙).
答案：1. didn't understand
2. thought
3. have learned
4. is
5. comes
6. appeared
7. will return
8. are making
2. thought
3. have learned
4. is
5. comes
6. appeared
7. will return
8. are making
解析：
1. 根据时间状语"Many centuries ago"，此处用一般过去时的否定形式，填didn't understand。
2. 结合"Many centuries ago"的过去语境，此处用一般过去时，填thought。
3. "so far"是现在完成时的标志词，主语people是复数，填have learned。
4. 描述彗星的本质属性是客观事实，用一般现在时，主语a comet是单数，填is。
5. 哈雷彗星的回归规律是客观事实，用一般现在时，关系代词which指代单数的Halley's Comet，填comes。
6. 根据时间状语"in 1986"，此处用一般过去时，填appeared。
7. 根据时间状语"in 2061"，是将来时间，用一般将来时，填will return。
8. "Now"表明现阶段正在进行的动作，用现在进行时，主语scientists是复数，填are making。
2. 结合"Many centuries ago"的过去语境，此处用一般过去时，填thought。
3. "so far"是现在完成时的标志词，主语people是复数，填have learned。
4. 描述彗星的本质属性是客观事实，用一般现在时，主语a comet是单数，填is。
5. 哈雷彗星的回归规律是客观事实，用一般现在时，关系代词which指代单数的Halley's Comet，填comes。
6. 根据时间状语"in 1986"，此处用一般过去时，填appeared。
7. 根据时间状语"in 2061"，是将来时间，用一般将来时，填will return。
8. "Now"表明现阶段正在进行的动作，用现在进行时，主语scientists是复数，填are making。