お茶（ちゃ）が冷（つめ）たいです。

それがいいです。

カレーが辛（から）い。

木（き）が高（たか）い。

体（からだ）が大（おお）きい。

川（かわ）が細（ほそ）い。

私（わたし）は赤（あか）色（いろ）の車（くるま）が欲（ほ）しいです。

バナナが欲（ほ）しいですか。

これがいいですか。

赤（あか）がいいです。

フルーツがいいです。

何（なに）がいい？

Very in depth difference between「は」and「が」

Why you should call が the "identifier particle"

Thorough breakdown of は and が - Page 299

Advanced: を vs. が with potential verbs

は vs. が quick breakdown and comparison

What it’s for and when to use it (and not “wa”)

<div class='writeup-body'>が is considered to be the subject marker in Japanese. This means that it marks someone or something that is performing an action, or it identifies someone or something as having a specific feature (this is usually a feature that the listener is not aware of).<ul class='writeup-examples--holder'><li class='writeup-example'><div class='writeup-example--japanese'>父（ちち）が働（はたら）く。</div><div class='writeup-example--english'>My father works.</div></li><li class='writeup-example'><div class='writeup-example--japanese'>父（ちち）は背（せ）が高（たか）い。</div><div class='writeup-example--english'>My father is tall.</div></li></ul>In both of these sentences, が puts focus on the person as being 'the one' who is performing an action/existing in some way (as opposed to any other person). Because of this, が is usually said to highlight what comes before it, while は highlights what comes after it.<ul class='writeup-examples--holder'><li class='writeup-example'><div class='writeup-example--japanese'>コーヒーが好（す）きです。</div><div class='writeup-example--english'>I like coffee. (I specifically like coffee)</div></li><li class='writeup-example'><div class='writeup-example--japanese'>テストは嫌（きら）いです。</div><div class='writeup-example--english'>I dislike tests. (In general, I don't like tests)</div></li></ul>が always shows the 'target' of a statement, when other targets also exist. This is why が is used to describe situations that are happening 'in the moment'.<ul class='writeup-examples--holder'><li class='writeup-example'><div class='writeup-example--japanese'>近所（きんじょ）の子供（こども）たちが走（はし）る。</div><div class='writeup-example--english'>The kids in the neighborhood run. (Not all the time, but sometimes)</div></li></ul>Because the event in this sentence is only one short moment out of many possible 'points in time' that could be described, が will be used.<div class='writeup-caution'><div class='caution-header'>Caution</div>が is not usually used to describe something about yourself, unless you are intentionally describing yourself compared to other people. If you want to talk about yourself 'in general terms', は will sound more natural (there are exceptions).</div></div>

Grammar Info

が

Subject marking particle, Identification particle