- I didn’t open the door when he was here.
It can mean I opened the door the other time.
- I didn’t open the door, when he was here.
Does it mean I didn’t open the door at all and I didn’t open the door especially when he was here?
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Sign up to join this communityIt can mean I opened the door the other time.
Does it mean I didn’t open the door at all and I didn’t open the door especially when he was here?
I didn’t open the door when he was here.
I would take this to mean "I didn't open the door while he was here" and you are right in saying you could have opened the door at other times.
I didn’t open the door, when he was here.
I don't think this really makes sense. If you wanted to convey your second meaning then I think you need to say something like "I never opened the door, particularly when he was here"