Only count nouns can take a number:
There is one camera. There are four cameras.
Noncount nouns don't use numbers:
There is some equipment. There is a lot of equipment.
Knowing the difference between count and noncount nouns will
make your English sound much better. Below are words and phrases
that can be used with count and noncount nouns. As you continue
through the next levels, you will probably need to come back
to this page.