"Ultima Thule lies 4bn miles from Earth in the Kuiper belt, a band of dwarf planets, space rocks and icy debris left over from the formation of the solar system 4.6bn years ago."
(The Guardian.)
What part of speech is "left over" in the paragraph above? Is it a noun, adjective or a verb?
6bn years ago. "Left over" is not a single part of speech, but two separate words, each belonging to a different category. The underlined element is a past-participial clause modifying "debris".
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Ultima Thule lies 4bn miles from Earth in the Kuiper belt, a band of dwarf planets, space rocks and icy debris left over from the formation of the solar system 4.6bn years ago.
"Left over" is not a single part of speech, but two separate words, each belonging to a different category.
The underlined element is a past-participial clause modifying "debris". The hea