Age old dentures are dentures that are extremely old, or old fashioned. These dentures in the past may have been made of wood or ivory or even the teeth of cadavers.
Time travel can change some thing from the past but not all
The past tense of change is changed.
The past participle of "change" is "changed."
I would think so, since the clarinet has nothing to do with your teeth.
the cost of dentures COST OF DENTURES
The past participle is changed.
The word since does not have a past tense as it is not a verb.
The cost of dentures is $400 What is the cost of dentures?
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Changed.
The past tense is changed.