〜てもいい expresses permission. It means “it is okay to …” or “you may …”. It is made with the verb’s て-form + も + いい. Key points: • Verb て-form + もいい • Means permission or allowance • Polite form: 〜てもいいです • Often used to ask or give permission For example, “ここに座ってもいいです” means “You may sit here.” If you want to ask for permission, you can say “座ってもいいですか” (Is it okay to sit?). This pattern is very common in daily life for rules and polite requests. It is soft and friendly. Remember: て-form + も + いい. You can think of it as “even if you do it, it’s good,” which becomes “it’s okay to do it.” Practice with simple verbs: 行ってもいいです, 食べてもいいです, 見てもいいです.