The preposition is 'on an island'.
Unless, of course, you've gone to a lot of trouble digging out a place where you can actually be in the island (underground).
The preposition 'in the islands' is appropriate when referring to a group of islands, such as 'in the Bahamas' or 'in The Florida Keys' as a group of islands represents a region; you can be in a region.
'From' can be either a preposition or an adverb, but it is not used as a verb or noun.
Yes it is a preposition. It is also used as an adverb and less frequently as a noun.
No, "get" is a verb. It can be used as a noun in some cases, but it is not a preposition.
"From" is not a noun. "From" is a preposition.
No, "home" is not a preposition. It is a noun, an adverb, or an adjective, depending on how it is used in a sentence.
'From' can be either a preposition or an adverb, but it is not used as a verb or noun.
Yes it is a preposition. It is also used as an adverb and less frequently as a noun.
No, "get" is a verb. It can be used as a noun in some cases, but it is not a preposition.
"From" is not a noun. "From" is a preposition.
Grand cannot be used as a preposition. It is an adjective, or more rarely a noun.
No. The word animals is a plural noun. It cannot be used as a preposition.
No, it is not a preposition. Thirty is a number, used as an adjective, noun, and pronoun.
No, "home" is not a preposition. It is a noun, an adverb, or an adjective, depending on how it is used in a sentence.
No, "all" is not a preposition. "All" is typically used as a pronoun, determiner, or adverb. It does not show the relationship between a noun and another word in a sentence, which is the function of a preposition.
No, "Friday" is a noun, specifically a proper noun referring to a day of the week. It is not a preposition, which is a word that shows the relationship of a noun or pronoun to another word in the sentence.
A clause used as the object of a preposition is called a noun clause. A noun clause takes the role of a noun. In the sentence, "I do not know anything except what I saw last night. " The preposition is "except" and its object is the noun clause "what I saw last night".
No. It is a coordinating conjunction. It can rarely be a noun. It cannot be used as a preposition.