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n. a/the grub
grub 作名词时为可数名词，指某些甲虫等昆虫的幼虫；复数形式是 grubs。
The bird ate a fat grub.
那只鸟吃了一只肥大的幼虫。
幼虫
先理解核心含义，再看它在真实句子里的用法。
幼虫
a soft thick wormlike larva of certain beetles and other insects
The bird ate a fat grub.
那只鸟吃了一只肥大的幼虫。
处于幼虫阶段的昆虫,尤指甲虫
An insect, especially a beetle, at an immature stage of its life cycle.
The children dug in the garden and found a fat grub under a rock.
孩子们在花园里挖土，在一块石头下发现了一条肥大的幼虫。
The robin pulled several grubs from the lawn to feed its chicks.
知更鸟从草坪上啄出几条幼虫来喂雏鸟。
After the rain, grubs appear on the path, and the birds quickly eat them.
雨后，小路上出现许多幼虫，鸟儿很快就把它们吃掉了。
grub 作名词时为可数名词，指某些甲虫等昆虫的幼虫；复数形式是 grubs。
The bird ate a fat grub.
那只鸟吃了一只肥大的幼虫。
grub for sth 表示为了寻找某物而翻掘、搜寻；过去式和过去分词均为 grubbed，现在分词为 grubbing。
The chickens grubbed for worms in the yard.
鸡在院子里翻找虫子。
Not this
The pig is grubing for worms in the yard.
Use this
The pig is grubbing for worms in the yard.
动词 grub 以重读闭音节结尾，末尾只有一个辅音字母 b，构成 -ing 分词时必须双写该辅音再加 -ing，因此正确形式是 grubbing，而不是 grubing。
Not this
The chickens grubbed the soil for seeds.
Use this
The chickens grubbed in the soil for seeds.
grub 作‘翻掘、四处搜寻’讲时是不及物动词，不能直接接地点名词作宾语；需要借助介词 in（或 around）引入地点，因此应说 grubbed in the soil。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
蛴螬（甲虫幼虫）
White grubs feed on the roots of crops.
蛴螬以作物根部为食。
草坪蛴螬
Lawn grubs have eaten large patches of the grass.
草坪蛴螬吃掉了一大片草皮。
蛴螬防治
This product offers effective grub control.
该产品可有效防治蛴螬。
四处翻找
The pigs grubbed around in the mud for roots.
猪在泥里四处翻找根茎。
连根挖出
They grubbed up the tree stumps to clear the land.
他们挖出树桩以清理土地。
到处翻找；翻寻
I grubbed around in my bag for the keys.
我在包里翻找钥匙。
刨挖寻找；搜寻
The chickens were grubbing for worms in the yard.
鸡在院子里刨找虫子。
挖除；根除
The government is trying to grub out corruption.
政府正在努力根除腐败。
Use grub naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
grub 里有 rub（摩擦），想象一只胖幼虫在土里蹭着翻掘找食；grub 既是幼虫，也是翻掘。
语域：neutral 常见场景：gardening、pest control grub 指昆虫幼虫时，通常用于园艺或户外场景，比较常见于口语和一般文章；正式学术写作中更常用 larva。
这些词都以 -ub 结尾，与 grub /ɡrʌb/ 押韵：rub, club, tub, sub, cub, hub。注意：grab /ɡræb/ 拼写与 grub 很像，但元音不同，不押韵。
Dictionary facts from ECDICT, WIKTIONARY.