How to say "Be" in Japanese

When translating "be" into Japanese, you must choose carefully between 整う and 活躍する. In Japanese, 整う (ととのう (totonou)) is typically associated with "to be prepared, to be in order, to be arranged (intransitive)" (Syllabus Level: N3) and represents Intransitive verb. Used when things are properly arranged, organized, or prepared. Can also refer to conditions being met. The transitive form is 整える. On the other hand, 活躍する (かつやくする (katsuyaku suru)) maps to "to be active; to play an active part; to flourish" (Syllabus Level: N3) and represents Often used to describe someone performing well or playing a significant role in a specific field, event, or situation.. A literal translation of "be" can often sound unnatural to native Japanese speakers if mixed up!