"good age", used in pointing out that someone is doing something below their age group

not necessary to; don't have to

If only ~

It's good / okay to... / is fine

a surname

(weather) drenching rains

prefer / had better; would rather

(colloquial, informal) good / (colloquial, predicative only) enough; not wanted any more.

committee member / a committee

capacity (number of people allowed in an elevator, boat, building, etc.) / any fixed number or quota of people