You may buy cheap clothes in Tsum Tsa Shui. 	You can buy cheap clothes in Tsum Tsa Shui. 
 	
I could pass the exam by revising hard. 	I was able / managed to pass the exam by revising hard. 
 	
I hope I could pass this exam. 	 
 	
The book is about how you could deal with difficult changes in your life. 	The book is about how you can deal with difficult changes in your life. 
 	
Do you think you may reply as soon as possible? 	 
 	
What could you learn from reading novels? 	What can you learn from reading novels? 
 	
You may try looking in Wikipedia. 	You could try looking in Wikipedia 
 	
Could you mind telling me the price? 	 
 	
I could appreciate it if you could let me know as soon as possible 	 
 	
Luckily he could escape from mainland China and at last, he could successfully arrived in Hong Kong. 	Luckily he managed to escape from mainland China and at last, he was able to successfully... 
 	
If you jumped from the 25th floor of your building, you could be killed. 	 
 	
If I won the Mark 6 I  travel around the world. 	  	
I will keep to my diet plan and exercise plan as long as I could. 	 
 	
In the future people can use robots in the house. 	In the future people will be able to use robots in the house. 
 	
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