快…了【kuài … le】

快…了 says something is nearly here: 快 goes before the verb or adjective and 了 closes the sentence. 快要…了 is the same pattern with 要 added, and means the same.

With a number

Before a number or a time, 快 says the figure is nearly reached.

No time phrase

快…了 and 快要…了 can't take a time phrase such as 明天 or 下个月. Use 就要…了 when there is one.

• × 明天快下雨了 → 明天就要下雨了

The pattern has no negative. To say something isn't close yet, use 还早 or 还没.

快 on its own is the adjective "fast", and 快点儿 means "hurry up". Neither is this pattern.