Some nouns use the same form for both singular and plural forms. Here are some of those irregular nouns:
one sheep – two sheep
one deer – two deer
one moose – two moose
one series – two series
one offspring – two offspring
one aircraft – two aircraft
one elk – two elk
one shrimp – two shrimp
Remember that some nouns do not change form to become plural.
It’s your turn. Find the noun in this sentence that does not change form for plural. The little boy ate a shrimp for dinner last night. Did you find the noun that can be plural without changing? Good for you!