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be overgrown with [sth]
形容词/被动用法，表示某物表面被植物覆盖，常带有荒废或无人打理的含义。
The wall was overgrown with moss.
墙上长满了青苔。
植被蔓生的；杂草丛生的
先理解核心含义，再看它在真实句子里的用法。
植被蔓生的；杂草丛生的
covered with plants that have grown wild
The wall was overgrown with moss.
墙上长满了青苔。
常与 with 连用，表示“长满……”
植物过于茂盛而破坏花园美观的。
Having large numbers of plants which have become too big, and are hence spoiling the picturesqueness of a garden.
The old garden was so overgrown that we could barely see the path.
那座旧花园杂草丛生，我们几乎看不到小路。
They pushed through an overgrown hedge to reach the abandoned house.
他们穿过一道杂草丛生的树篱，才到达那座废弃的房子。
The overgrown grass in the backyard made it hard to play football.
后院长满杂草的草皮让人很难踢足球。
形容词/被动用法，表示某物表面被植物覆盖，常带有荒废或无人打理的含义。
The wall was overgrown with moss.
墙上长满了青苔。
作定语修饰名词，形容草木长得过于茂密；也用于人或身体部位，表示“发育过度的”。
They followed an overgrown path into the woods.
他们沿着一条草木丛生的小路走进树林。
这是动词 overgrow 的现在完成时，overgrown 为过去分词；主语为植物，宾语为被覆盖的物体。
The wisteria has overgrown the porch.
紫藤爬满了门廊。
Not this
The garden is overgrow with weeds.
Use this
The garden is overgrown with weeds.
be 动词后需要用过去分词作表语表示状态；overgrow 是动词原形，这里应改为其过去分词 overgrown，意思是“杂草丛生的”。
Not this
She has overgrown her old school uniform.
Use this
She has outgrown her old school uniform.
表示“长大了而穿不下/不再适合某物”要用 outgrow，其过去分词是 outgrown；overgrown 是“生长过大的、蔓生的”，不能接“衣物”作宾语。
Not this
He is overgrown now.
Use this
He is grown up now.
表示“长大成人”要用 grow up 的过去分词 grown up；overgrown 表示“长得过大”或“杂草丛生”，没有“成年”的意思。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
杂草丛生的花园
The house stood behind an overgrown garden.
房子坐落在一个杂草丛生的花园后面。
草木丛生的小路
We followed an overgrown path through the woods.
我们沿着一条草木丛生的小路穿过树林。
杂草丛生的草坪
The overgrown lawn needed mowing.
这块杂草丛生的草坪需要修剪了。
爬满常春藤的
The old wall was overgrown with ivy.
那堵旧墙爬满了常春藤。
疯长的植被
The path was hidden by overgrown vegetation.
小路被疯长的植被遮住了。
长不大的孩子；行为幼稚的大人
He's fifty years old, but he's just an overgrown child who refuses to take responsibility.
他已经五十岁了，却只是个拒绝承担责任的长不大的孩子。
我能长大并变得杂草丛生吗？——詹姆斯·布莱克《Overgrown》
The abandoned garden is overgrown with ivy and thorns.
那座废弃的花园里长满了常春藤和荆棘。
它杂草丛生，但它还活着。——《秘密花园》
After years of neglect, the courtyard is overgrown with moss and wildflowers.
经过多年的荒废，庭院里长满了苔藓和野花。
Use overgrown naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
over（超过）+ grown（长）＝长得超过了正常范围，想象野草疯长，盖过了整条小径。
语域：neutral 常见场景：描述杂草丛生的花园或庭院、描述植物覆盖道路或建筑等 该词在表示“杂草丛生”时属于中性表达，正式与非正式场合都常用；日常生活多用于描述院子、小路等，书面语也可用于描写废墟或野外。通常不带强烈褒贬色彩。
作形容词时用于人常含贬义；也是动词 overgrow 的过去分词。
Dictionary facts from ECDICT, WIKTIONARY.