fish当“鱼肉”讲时，是不可数名词，无复数形式。fish当“鱼”讲时，用作可数名词，指“鱼的条数”时单数和复数形式相同。two fish.两条鱼；指“鱼的种类”时，复数形式为fishes。two fishes.两种鱼。
fish：英[fɪʃ]；美[fɪʃ]
n.鱼；鱼肉
v.钓鱼；捕鱼；在…捕鱼(或钓鱼);摸找
第三人称单数：fishes
复数：fishes fish
现在分词：fishing
过去式：fished
过去分词：fished
fish.鱼肉；是“不可数名词”；
Helikes to eat fish.他喜欢吃鱼肉。
fish.鱼，指鱼的条数，单数和复数相同；
1、There is 1 fish in the fish tank.鱼缸里有一条鱼。
2、There are 3 fish in the fish tank.鱼缸里有三条鱼。（在这里，fish为可数名词，复数形式还是fish）
fish.鱼，指鱼的种类，复数形式是fishes；
There are 2 fishes in the fish tank.鱼缸里有两种鱼。
1、The fish lay thousands of eggs at one time.
这种鱼一次产卵数千个。
2、These fish are found in shallow waters around the coast.
这些鱼生长在海边浅水水域。
3、I've never been a great one for fish and chips.
我从来不是个好吃炸鱼薯条的人。
4、There are about 30 000 species of fish in the world.
世界上约有3万种鱼。
5、Fishing is good at high water.
高水位有利于钓鱼。
6、How can you tell what sex a fish is?
你怎样辨别一条鱼的雌雄？
7、I don't like fish.
我不喜欢鱼。
8、You need a licence to fish in this river.
你在这条河里钓鱼要有许可证。
9、We enjoyed a day's fishing by the river.
我们在河边享受了一天垂钓之乐。
10、In the wild,this fish can reach a weight of 5lbs.
这种鱼在自然生存环境中可以长到5磅重。
11、Stand the fish tank on a firm base.
把鱼缸放在牢固的基座上。
12、The fish return to the river as adults in order to breed.
这种鱼长成以后回到河中产卵。
13、This fish has a lot of bones in it.
这种鱼多刺。
14、How many fish did you catch?
你捕到几条鱼？
15、The eyes of some fish have a greater sensitivity to light than ours do.
有些鱼的眼睛对光比我们敏感。
16、The wine makes a good accompaniment to fish dishes.
这种葡萄酒很适合作鱼菜的佐餐酒。
17、Many dolphins die each year from entanglement in fishing nets.
每年都有许多海豚被捕鱼网缠绕致死。
18、The list of endangered species includes nearly 600 fishes.
濒临灭绝物种的名单中列有将近600种鱼。
19、The future looks bleak for the fishing industry.
渔业前景暗淡。
20、Three portions of fish and chips,please.
请来三份炸鱼薯条。