い-Adjective く します

When to use

くする: you MAKE it so (部屋を明るくする). くなる: it BECOMES so.

Explanation

By adding くします to an い-adjective, you express making something (or causing something to become) the quality of that adjective. In English, this often corresponds to phrases like 'make something more ADJECTIVE.'

• 部屋へやを明あかるくします。

  I will make the room brighter.

  Heya o akaruku shimasu.

• 友達ともだちの気分きぶんを楽たのしくします。

  I will make my friend’s mood more pleasant.

  Tomodachi no kibun o tanoshiku shimasu.

• 仕事しごとが簡単かんたんになるように、やり方かたを早はやくします。

  I will make the way of doing things faster so that the work becomes easier.

  Shigoto ga kantan ni naru you ni, yarikata o hayaku shimasu.

• 食たべ物ものを美味おいしくします。

  I will make the food delicious.

  Tabemono o oishiku shimasu.

Change (Become / Make / Decide On)

• い-Adjective く する/なるi-Adjective kusuru/naruN4Express a change happening or making something change.
• な-Adjective に しますna-Adjective ni shimasuN5Expressing a decision or preference with a な-adjective.
• な-Adjective に なりますna-Adjective ni narimasuN5Express a change or transformation into a state described…
• な-adjective に する/なるN4Used to indicate change or decision; 'to become' or 'to…
• Noun に しますNoun ni shimasuN5Express a choice or decision; 'choose', 'decide on'.
• Noun に なりますNoun ni narimasuN5Expresses change or becoming something; 'to become', 'to…

Compare when to use each