飛(ひ)行(こう)機(き) hikoukiは wa大(たい)変(へん) taihen低(ひく)く() hikuku飛(と)ん()で()い()た() tondeita。 The plane was flying very low. Literal Airplane [topic-は] very low flying was. 大変低く飛んでいた — 大変 is a formal intensifier. 低く is the adverbial form of 低い. ていた marks past progressive — the plane was in the process of flying low. transportation~ていた (past progressive/state)
飛(ひ)行(こう)機(き) hikoukiは wa大(たい)変(へん) taihen低(ひく)く() hikuku飛(と)ん()で()い()た() tondeita。 The plane was flying very low. Literal Airplane [topic-は] very low flying was. 大変低く飛んでいた — 大変 is a formal intensifier. 低く is the adverbial form of 低い. ていた marks past progressive — the plane was in the process of flying low. transportation~ていた (past progressive/state)