2週4日目 君さえいれば
Value・ability・condition
接続：Nさえ＋Vば／Aければ
Just need A then B
注意 / Note：State the ONLY CONDITION: just one thing is enough, nothing else is needed. The word さえ itself creates the meaning «just» - removed to become a regular conditional sentence and completely lose its emphasis.
比較 / Compare：Same song: 〜さえ／〜でさえ. These models are often mistakenly chosen for each other — carefully read the 接続 and nuances above and then decide.
よく出る形 / Common form：名詞さえ＋動ば形／イ形ければ／ナ形なら。Also meet 動ます形＋さえすれば and動て形＋さえいれば.
あなたさえいれば、何もいらない。
As long as I have you, I don't need anything else.
時間さえあれば、完成できます。
It just takes time to complete.
やり方さえ分かれば、あとは一人でできます。
As long as I know how to do it, I can do the rest myself.