There are five kinds of nouns:

Common nouns, collective nouns, material nouns, proper nouns, and abstract nouns.
What kinds of nouns is 'hour'?
It's a common noun, so it is a countable noun. Therefore we have to use many before hours. For example, how many hours do you watch TV every day?

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Is my explanation grammatical? I'd like to explain about nouns.

2 answers

There are five kinds of nouns:
common nouns, collective nouns, material nouns, proper nouns, and abstract nouns.
What kind of noun is 'hour'?
It's a common noun, so it is a countable noun. Therefore<~~add comma we have to use 'many' before 'hours.' For example, how many hours do you watch TV every day?

Corrections are in bold. Overall, you did well.

=)
which of these are proper nouns Cummings, research,time
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