以下是描述“树很茂盛”的常用英语表达及用法解析：
一、核心形容词
lush 强调植物生长繁茂，常与"verdant"（多用于描述草地）搭配使用，如：
> The forest is lush with greenery.
verdant
多用于描述充满生机的绿色植被，如：
> The hillside is covered in a verdant sea of trees.
dense
侧重树木密集，常与"forest"等词汇搭配，如：
> The dense forest was almost impenetrable.
thick
简单直接，如：
> The trees are thick with leaves in autumn.
二、短语表达
abundant growth： 强调生长旺盛，如： > The abundant growth of trees made the forest a haven. exuberant vegetation
> The exuberant vegetation of the rainforest is unparalleled.
run riot：形象化表达过度生长，如：
> The wildflowers ran riot in the meadow.
三、其他相关词汇
flourishing：多用于描述花朵或植物繁盛开放，如：
> The garden is in full flourishing.
wooded：侧重被树木覆盖的状态，如：
> The village is nestled in a wooded area.
四、例句参考
1. The lushgardens were a sight to behold, with trees swaying gently in the breeze.
2. The densejungle was teeming with exotic plants and animals.
3. The abundantgrowth of trees in the park provided ample shade on hot summer days.
建议根据具体语境选择形容词，例如描述森林整体状态用"lush"或"dense"，强调生长活力用"exuberant"，而"thick"则更侧重密度。