Using 'hadn't' is incorrect because it conflicts with the present perfect tense of the sentence. 'Had' is for something that started and ended in the past. In any case, using any form of have is incorrect here, which will suggest that the matter is yet to become serious.
In addition, would the answer remain the same if the sentence was rewritten as "I have treated this matter as if it weren't very serious." ? Or would I have to reverse the tense of the sentence within "as if" back to past perfect ?
It has to be some unreal condition in the past, eg
If it had been more serious, I would have treated it differently.
Another use is for an action that is earlier than some other action I had been treating it as if it weren't very serious, but the situation changed after we did some more investigation.
But I'm still somewhat confused. As far as I may recall, "as if" as a simile, which I applied in the sentence to indicate the matter is actually serious, seems to require past perfect tense when the event is set in the past, for instance here, "She looked at me as if she'd had some bad news."(from dictionary). Given the example, wouldn't th
I understand the relativity of time in using past present, but what I truly don't understand is the application of simile, as in "She looked as if she'd had some bad news" from a dictionary. With rather similar structure, I can't see the reason why the previous sentence is accepted, while "I have been treating..." or "I have treated..."(in
This is not an unreal condition; everything is true here. The expression on her face was really shock and unhappiness because she had (before she looked at me) received bad news or something equally dismaying. So there are two events: "she looked" and "she received bad news" where the bad news happens before the look. The p