Subject + 绿 + 了
绿 (lǜ) is an adjective meaning "green." It is used to describe the color of objects, especially plants and nature. For example, 都绿了 means "everything has turned green."
雨后山上变得更绿了。
Yǔ hòu shān shàng biàn de gèng lǜ le.
After the rain, the mountain became even greener.
她穿了一条绿裙子,特别好看。
Tā chuānle yī tiáo lǜ qúnzi, tèbié hǎokàn.
She wore a green dress and looked really pretty.
窗外的树叶绿得像翡翠一样。
Chuāng wài de shùyè lǜ de xiàng fěicuì yīyàng.
The leaves outside the window are as green as jade.