yokereba よければ

In Japanese, yokereba よければ, also spelled yokereba 良ければ, means "if you'd like to," or "if you want to."

• yokereba yonde kudasai
  よければ読んでください
  If you'd like, please read [it].
• Please read if you'd like.

It's basically synonymous with yokattara よかったら, the only difference being that yokereba is more polite.^{[「よければ」と「よかったら」の違いについて - detail.chiebukuro.yahoo.co.jp, 2019-02-13]}

Grammatically, yokereba is the ba-form of yoi よい.

Examples

For reference, some examples of yokereba in Japanese:

• yokereba renraku kudasai
  良ければ連絡ください
  Please contact [me] if you'd like.
• yokereba goran kudasai
  良ければご覧ください
  Please look if you'd like.
• yokereba oshiete kudasai
  よければ教えてください
  Please teach [me] if you'd like.
• yokereba tsukatte kudasai
  よければ使ってください
  Please use [it] if you'd like.

Synonyms

Note that, besides yokattara, there are other words that are synonymous with yokereba:

• yoroshikattara
  よろしかったら
  (tara-form of yoroshii よろしい)
• yoroshikereba
  よろしければ
  (ba-form of yoroshii)

These would be more polite than yokereba, which is more polite than yokattara.