~なら
If that is the situation
You'll be able to respond to known information by giving advice, a judgment, or a result for that case.

京都に行くなら、このお寺がおすすめです。
kyouto ni iku nara, kono otera ga osusume desu.
What do you think this sentence means?
If you are going to Kyoto, I recommend this temple.
Give advice based on a premise
~なら takes a proposed or known situation as the basis for a response. It often means “if that is the case” or “if you are talking about that.” The advice can concern something done before the proposed event.
車で行くなら、早く出ましょう。
kuruma de iku nara, hayaku demashou.
If we are going by car, let’s leave early.
Form and use ~なら
Nouns and な-adjectives normally omit だ before なら. Unlike たら, なら does not require the main action to wait until the premise has happened.
車で行くなら、早く出ましょう。
kuruma de iku nara, hayaku demashou.
If we are going by car, let’s leave early.
静かなら、ここで勉強します。
shizuka nara, koko de benkyou shimasu.
If it is quiet, I will study here.
日本で桜を見るなら、四月がいいですよ。
nihon de sakura o miru nara, shigatsu ga ii desu yo.
If you want to see cherry blossoms in Japan, April is a good time.
パソコンを買うなら、駅前の店が安いですよ。
pasokon o kau nara, ekimae no mise ga yasui desu yo.
If you're buying a computer, the shop by the station is cheap.
寒いなら、窓を閉めましょうか。
samui nara, mado o shimemashou ka.
If you're cold, shall I close the window?
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