No no one is too old to take naps.
No, they go to Juvy.
Well if it is an 8 year old dog it is 8 years old.
Only if it is rated G.
The correct grammar between 'an 8 year old' or an '8 years old child' is 'an 8 year old child'.
If this is happening then you need to take the 8 year old girl to see a qualified medical practitioner, a Doctor.
Yes, it is.
yes, if you are an adult
Depends on the person
Take him to the doctor