anat0l
Enthusiast
- Joined
 - Dec 30, 2006
 
- Posts
 - 12,236
 
- Qantas
 - Gold
 
- Virgin
 - Red
 
- Oneworld
 - Sapphire
 
- Star Alliance
 - Gold
 
Example 1
A: "Do you know when he died?"
B: "Yes, I do know when he died."
Example 2
A: "Do you know when he died?"
B: "Yes, I do - he died three hours ago."
Example 3
A: "Do you know when he died?"
B: "I don't know when he died, but I do know he died of a heart attack."
In each of the examples above, the word "do" (or "I do" in the second one) as highlighted:
Which one?
	
		
			
		
		
	
				
			A: "Do you know when he died?"
B: "Yes, I do know when he died."
Example 2
A: "Do you know when he died?"
B: "Yes, I do - he died three hours ago."
Example 3
A: "Do you know when he died?"
B: "I don't know when he died, but I do know he died of a heart attack."
In each of the examples above, the word "do" (or "I do" in the second one) as highlighted:
- Is grammatically correct, and its presence modifies the semantics slightly
 - Is grammatically correct, but adds nothing to the sentence as if it had been omitted
 - Is grammatically incorrect, though socially acceptable
 - Is grammatically incorrect and is a bad habit
 
Which one?
				
						
 
 
 
 
 
 
 
	
 
 
 
 
 
 