a human dwelling is a place that give shelter from the weather.
The verb in the sentence is "may have been." This is a modal verb construction that expresses possibility or uncertainty about the past action of caves being the first human dwellings.
L. N. Verma has written: 'Environment and human habitation' -- subject(s): Dwellings, Human ecology, Human settlements
cliff dwellings
Mountain Dwellings was created in 2008.
Neolithic Dwellings Museum was created in 1979.
most spiders do find it very interesting going through human dwellings (such as beds) because they are curious
The noun dwellings is a plural, common noun. Dwellings is also a gerund, a verbal noun; the present participle of the verb to dwell used as a noun.
Mice are an example of animals that have adapted to human activities. Mice often live near human dwellings or buildings and feed off food that humans have dropped or left out.
Lucien Lepoittevin has written: 'La Maison des origines' -- subject(s): Housing, Human settlements, Prehistoric Dwellings
Four Dwellings High School was created in 1940.
The Improved Industrial Dwellings Company was created in 1863.
East End Dwellings Company was created in 1882.