Just curious if I were to use the first example (the common one) and add by saying 'that is or was due tomorrow', would it be correct to use either 'is or was', or is only 'was' possible?
I did not know we had an assignment that was due tomorrow. I did not know we had an assignment that is due tomorrow.
I understand that all three examples ultimately lead to the same message, as you have said they practically convey the same message, as there are many minor details in trying to explain the differences. Is that correct?
Also, matching would always be correct when in doubt and is the more common, which you pointed out. Have I unders