The Grammaring Guide to English Grammar with Exercises

Nouns with the same singular and plural forms

Certain nouns have an identical singular and plural form. Some of these nouns end in -s: means, series, species.

The bicycle is a

means

of transport.

The five human senses are our

means

of communication with the material world.

A

series

of burglaries has been going on around the neighbourhood.

What are your favourite TV

series

?

A new

species

of bird has been discovered in Indonesia recently.

Since the 17^th century, more than 500 marine

species

have become extinct in the US.

Other examples are:

aircraft

deer, sheep

fish, carp, pike, salmon, trout