anat0l
Enthusiast
- Joined
- Dec 30, 2006
- Posts
- 11,666
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?