全部分かったわけではありません。

N5 全部 zenbu all, everything N5 では dewa then, well, in that case

N3 全 zen / matta.ku, sube.te whole, entire, all N3 部 bu / -be section, bureau, dept N3 分 bun, fun, bu / wa.keru, wa.ke, wa.kareru, wa.karu, wa.katsu part, minute of time, segment

N5 〜です desu Used at the end of a sentence, polite affirmative form, means to be depending on context N5 〜ます masu Used at the end of verbs, polite present or future form, makes the sentence more polite N5 〜で de Indicates where an action happens, means used, tool, cause, or material depending on context N5 〜か ka Marks a question, alternative, or uncertainty, appears at the sentence end or between options N5 〜は wa Marks the topic of the sentence, indicates what the sentence is about, can contrast with another element, organizes main information