How to say "Be" in Japanese

When translating "be" into Japanese, you must choose carefully between 役に立つ and 感激する. In Japanese, 役に立つ (やくにたつ (yaku ni tatsu)) is typically associated with "to be useful, to be helpful" (Syllabus Level: N4) and represents A set phrase meaning to be useful or helpful for someone or something. It describes the utility of an object, skill, or person. Often followed by the particle に. On the other hand, 感激する (かんげきする (kangeki suru)) maps to "to be deeply moved, to be impressed, to be touched" (Syllabus Level: N3) and represents A suru verb expressing a strong feeling of emotion, often admiration, gratitude, or joy, upon experiencing something profound or touching.. A literal translation of "be" can often sound unnatural to native Japanese speakers if mixed up!