• Basic forms
• 成る — to become; to turn into / base form
• 成ります — become / masu form
• 成った — became / ta form
• 成って — becoming and … / te-form
• 成らない — do not become / negative
• 成れば — if (it) becomes / conditional
• 成れ — become! (rare) / imperative
• Common expressions
• 大人になる — to become an adult
• 問題になる — to become a problem
• More
• 成功になる — to turn into success (formal)

成る（なる） is a godan, intransitive verb. It describes a **change of state** or **natural result**, without directly acting on an object.

• Basic forms
• 成す — to make; to accomplish / base form
• 成します — accomplish / masu form
• 成した — accomplished / ta form
• 成して — accomplishing and … / te-form
• 成さない — do not accomplish / negative
• 成せば — if (someone) accomplishes / conditional
• 成せ — accomplish! / imperative
• Common expressions
• 成功を成す — to achieve success
• 偉業を成す — to accomplish a great feat
• More
• 成し遂げる — to carry through

成す（なす） is a godan, transitive verb. It focuses on **deliberate action** — making something happen or achieving a result.