ともなれば
(Tomo nare ba)
when one becomes / when it comes to being.
Connection rules
- +Noun / V plain + ともなれば.
- +Role / state consequences — 'once one is X, then naturally Y'.
- +Similar to 〜となれば (N3) but more about status / role than circumstance.
Examples
1.
大人ともなれば、責任を持たなければならない。

Otona to mo nare ba, sekinin o mota nakere ba nara nai.
Once one is an adult, one must bear responsibility.
「when one becomes / when it comes to being」
2.
社長ともなれば、多くの判断が求められる。

Shachou to mo nare ba, ooku no handan ga motome rareru.
Once one is a company president, many judgments are demanded.
「when one becomes / when it comes to being」
Practice
Once you become the company president, you will no longer have time to rest even on weekends.
___、週末も休む暇などなくなるだろう。
Romaji also accepted