1. It was not long before he had to leave for another place.
Before long , he was forced to move on.
2. The room is so small that we can’t put the piano in it.
The room is too small for us to put the piano in.
3. By chance I met an old friend of mine that day.
I happened to meet an old friend of mine that day.
It happened that I met an old friend of mine that day.
4. That was because we were not careful enough.
That was because of our carelessness.
5. The people were in deep sorrow when they heard this sad news.
The people were in deep sorrow at this sad news .www.cooyu.net
6. If you won’t do it, I’ll get Tom to do it.
If you won’t do it, I’ll make/ have Tom do it.
7. We think that it is our duty to take care of these young trees.
We think it our duty to take care of these young trees.
8. When I was a child, I often played here.
As a boy, I used to play here.
9. I have never seen such a beautiful suit before.
I have never seen so beautiful a suit before.
10. If it doesn’t rain, we’ll hold the sports meet.
Unless it rains, we’ll hold the sports meet.
11. Do you mind if I smoke here?
Do you mind my/me smoking here?
12. I was walking aimlessly through the street when I saw a tailor’s shop.
I was wandering through the street when I caught sight of a tailor’s shop.
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作文地带知识拓展:
变化[biàn huà]的释义：意思为事物被另外的事物取代，事物状态或形式的转换或差别，即事物从一种状态转变为另一种状态。变化指事物状态或形式的转换或差别,即事物从一种状态转变为另一种状态。近义词为变动。出自《易·乾》：“乾道变化，各正性命。”换模型讲：变化是事物性质的体现。
1.名词事物在形态上或本质上产生的新状况。
2.动词事物产生了新的状况。
变化英文详细解释(English Detailed Explanation)：
Change 英[tʃeɪndʒ] 美[tʃeɪndʒ]：
the act of becoming different, or the result of something becoming different
改变；改动；变化；变动
Let me know if there's any change in the situation.
要是情况有了什么变化请告诉我。
something that is pleasant or interesting because it is unusual or new
（令人愉快或有趣的）改进，改变
It's nice to see her smile for a change.
看到她笑了，真好。
money in the form of coins rather than notes
硬币；辅币
She gave me €5 in change.
她给了我5欧元的硬币。
to exchange one thing for another thing, especially of a similar type
换，交换
She's just changed jobs.
她刚换了工作。
to make or become different
改变，变化
I almost didn't recognize her - she'd changed so much.
我几乎认不出她了——她变化太大了。
to take something you have bought back to a shop and exchange it for something else
（将购买的东西拿回店里去）换，交换
I had to change those trousers I bought for (= take them back to the shop in order to get) a bigger pair.
我不得不把买来的裤子拿回去换了条大些的。
to form a new opinion or make a new decision about something that is different from your old one:
If you change your mind about coming tonight, just give me a call.
要是你改变主意今晚不来了，给我打个电话就行。
to get off a train, bus, etc. and catch another in order to continue a journey
换乘，转乘（火车、公共汽车等）
I had to change (trains) twice to get there.
到那里我得换乘两次（火车）。
to put a vehicle into a different gear, usually in order to change the speed at which it is moving
（车辆）换挡，变速
UK Change down to go round the corner.
转弯要换到低挡。
smaller units of money given in exchange for larger units of the same amount
（换开的）零钱
Do you have change for a 20-dollar bill?
你能换开20美元的钞票吗？
to get or give money in exchange for money, either because you want it in smaller units, or because you want the same value in foreign money
把…换成零钱;兑换
Could you change a £10 note (for two fives), please?
请问你能把一张10英镑换开（换成两张5英镑）吗？
the money that is returned to someone who has paid for something that costs less than the amount that they gave
找头，找给的零钱
I think you've given me the wrong change.
我想你找错我钱了。
to remove one set of clothes and put a different set on yourself or a young child, especially a baby, or to remove dirty sheets from a bed and put clean ones on it
（给…）换衣服;（给…）换床单
You don't need to change - you look great as you are.
你不用换衣服——这样看上去就很好。
When the wind or the tide (= the rise and fall of the sea) changes, it starts to move in a different direction.
（风或潮水）改向
The tide is starting to change.
潮水开始改向了。
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