10課 条件形
Conditional sentences — たら / ば / と / なら / 場合
接続：V ば形／い形〜ければ／な形・N ＋ なら
If… then… — a general, normative or hypothetical condition. Often used for proverbs and natural cause and effect relationships.
注意 / Note：If the previous sentence is will verb, then the next sentence does not use command, invitation, or desire. If the preceding clause is an adjective or a stative verb, it's okay.
比較 / Compare：ば（rule, assumption）／たら（once, specifically）／と（inevitable, automatic）／なら（receiving the topic）.
よく出る形 / Common form：〜ば、〜。／〜ば〜ほど（the more… the more…）.
春になれば、桜が咲きます。
Every spring, cherry blossoms bloom.
安ければ安いほどいいです。
The cheaper the better.
時間があれば、遊びに来てください。
If you have time, come play.