雨が降っているから行きません。

N5 雨 ame rain N5 降っている futte iru is raining N3 行き iki going, outbound trip

N5 雨 u / ame, ama-, -same rain, pluie, lluvia N3 降 kou, go / o.riru, o.rosu, fu.ru, fu.ri, kuda.ru, kuda.su descend, precipitate, fall N5 行 kou, gyou, an / i.ku, yu.ku, -yu.ki, -yuki, -i.ki, -iki, okona.u, oko.nau going, journey, carry out

N5 〜ます masu Used at the end of verbs, polite present or future form, makes the sentence more polite N5 〜ている te iru Indicates ongoing action, continuous state, repeated habit, or resulting condition depending on context N5 〜から kara Indicates cause or reason, equivalent to because or since, connects two clauses explaining reason N5 〜が ga Marks the grammatical subject, highlights new information, can also show slight contrast in some sentences N5 〜か ka Marks a question, alternative, or uncertainty, appears at the sentence end or between options