Only verbs have past present and future tenses. Obesity is not a verb it is a noun.
His obesity is becoming a problem for him - (is becoming is the verb)
did
Was, has been; or (in past perfect) had been.
The present perfect tense of "be":I have beenWe have beenYou have beenHe/she has beenThey have been
Hurt is one of those words that are sort of neither.
Obese can not be past tense because it's not an action. Ex: She ran to the store. <-- Ran is past tense because it is an action, while obese is an adjective, or a describing word.
If you want to say it in the past tense, you can say Were you able to go there? Could you go there? (if it is in the appropriate context it works in past tense as well) Future Will you be able to go there?
How about "Obesity".
morbid obesity
What leads to obesity
There's obesity everywhere.
hyperplastic obesity
Obesity can be generic because obesity isn't always to do with eating to much and not burning of enough calories. A portion of obesity can be genetically mediated.