We use the verb "to be" to express age in English. There are two possibilities: He is eight. OR He is eight years old.
Tom is twenty-two.
My brother is thirty-six years old.
Already and Yet Use "already" in positive sentences to express something done recently. Use "yet" in the question and negative forms.
Have you finished that report yet?
He's already talked with Bob.
Short Answers
When answering yes/no questions, use the auxiliary verb to reply.
Did he come last week? - Yes, he did. (Past Simple)
Have you lived here long? - No, I haven't. (Present Perfect)
Do you like him? - Yes, I do. (Present Simple)
Asking about Experience
Use the present perfect to inquire about life experiences.
Have you ever seen a play by Shakespeare?
Has she ever visited France?
Past Continuous for Interrupted Actions
Use the past continuous to express an interrupted action in the past.
She was talking on the phone when he arrived.
What was she doing when you asked her the question?
