1 and fish are mostly in the form of zero plural, and can also be changed into fishes according to rules, which often means "many kinds of fish".

2. When fish is used as the subject to express singular meaning, the predicate verb is in singular form, and when it is used to express plural meaning, the predicate verb is in plural form.

3. apieceoffish means "a piece of fish", and afish can sometimes mean "a kind of fish".

4. The basic meaning of fish as a verb refers to fishing with tools. Catch in the middle "can also mean" touch out (something) "and" pull out (something) ".