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there is a goldfish in [place]
there is 结构表示“某处有某物”，后接单数可数名词。
There is a goldfish in the tank.
鱼缸里有一条金鱼。
金鱼
goldfishes — plural of goldfish
先理解核心含义，再看它在真实句子里的用法。
金鱼
small golden or orange-red freshwater fishes of Eurasia, kept in ponds or aquariums
There is a goldfish in the tank.
鱼缸里有一条金鱼。
一种小型鱼类,金鱼,通常为橙色
A type of small fish, Carassius auratus, typically orange-colored.
一种小鱼形状的橙色咸饼干。
A small orange saltine-like cracker shaped in the form of a fish.
欧亚大陆的小型金色或橙红色淡水鱼,用于池塘或水族箱
small golden or orange-red freshwater fishes of Eurasia used as pond or aquarium fishes
My goldfish has been swimming around the tank all morning.
我的金鱼整个上午都在鱼缸里游来游去。
She bought two goldfishes at the pet store yesterday.
她昨天在宠物店买了两条金鱼。
Don't feed the goldfish too much, or it will get sick.
别给金鱼喂太多食，不然它会生病。
there is 结构表示“某处有某物”，后接单数可数名词。
There is a goldfish in the tank.
鱼缸里有一条金鱼。
goldfishes 是词典标注的复数形式，these 后接复数名词。
These goldfishes come from China.
这些金鱼来自中国。
the 用于指双方都知道的特定的金鱼；feed 后直接接宾语。
I feed the goldfish every morning.
我每天早上喂金鱼。
Not this
I have goldfish at home.
Use this
I have a goldfish at home.
goldfish 是可数名词，单数形式前需要加冠词 a；中文没有冠词，容易漏掉，加 a 后明确表示“一条金鱼”。
Not this
I saw an goldfish in the store.
Use this
I saw a goldfish in the store.
goldfish 以辅音音素 /ɡ/ 开头，所以不定冠词要用 a，不用 an；an 用于元音音素前。
Not this
There are many goldfishs in the pond.
Use this
There are many goldfishes in the pond.
goldfish 的复数形式是 goldfishes，不是直接在词尾加 s；fish 类词的复数变化需要记忆。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
喂金鱼
I feed the goldfish every morning.
我每天早上喂金鱼。
金鱼缸
The goldfish bowl needs cleaning.
金鱼缸需要清洗了。
金鱼般的记性，极差的记性
He has a goldfish memory for names.
他记名字的记性像金鱼一样差。
养金鱼
They keep goldfish in a small tank.
他们在一个小水族箱里养金鱼。
金鱼池
There are several goldfish in the garden pond.
花园池塘里有几条金鱼。
记忆像金鱼一样差；健忘
I have a memory like a goldfish — I can't remember what I had for breakfast.
我的记忆力像金鱼一样差——连早餐吃了什么都记不住。
金鱼缸；毫无隐私的处境
Living in the public eye is a goldfish bowl for celebrities.
活在公众视野下对名人来说就像待在金鱼缸里，毫无隐私。
金鱼的记忆只有三秒钟。
People often tease me, saying a goldfish's memory lasts only three seconds, because I always forget people's names.
人们常取笑我，说金鱼的记忆只有三秒钟，因为我总忘记人名。
Use goldfishes naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想：gold（金色）+ fish（鱼），金黄色的鱼就是金鱼。
语域：neutral 常见场景：宠物店、水族馆、儿童科普读物 通常用于日常交流、宠物饲养和科普介绍等场景，属于中性常用词，在口语和书面语中都比较常见。
这些词都以 /ɪʃ/ 结尾，与 goldfish 的第二个音节 /fɪʃ/ 押韵。注意：goldfish 的重音在第一个音节，但押韵看词尾；不要因拼写把 gold 读成 /ɡoʊld/ 时当作押韵，也不要与 golf /ɡɑːlf/ 混淆。
Dictionary facts from ECDICT, WIKTIONARY.