"not only because it's according to the time of speaking but also the scar is present so we can't use "was" if it's here.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
AnonymousBut I wonder why I cannot say 'That scar is caused by an accident he had last summer'.Grammatically, it is fine. But you have to consider the meaning of the verb. "Cause" always goes back to the time of the incident, because that is when the cause was present.