Permission to do an action can be requested or given by taking the て form of the verb, and appending もいい.
- How to use verb + ても ( = temo) (maggiesensei.com)
- Chino, Naoko. “Basic Pattern 26.” A Dictionary of Basic Japanese Sentence Patterns, Kodansha, 2000, pp. 188–189
- Makino, Seiichi and Michio Tsutsui. “Main Entries.” A Dictionary of Basic Japanese Grammar, The Japan Times Ltd., 1989, pp. 471–473