YES, use son or están before the preposition.
Estan is used for matters that are not permanent as an example Estoy feliz. but 'son' is used for things that might not necessarily exchange.
Prepositions are phrases that impact (with out describing as an adjective does) a noun or pronoun, normally previous it. In other phrases, prepositions describe the relationship of people, locations and things.
Estar is one of verbs in Spanish that means 'to be. ' while we use the verb estar, we have to conjugate, or trade, the verb to fit the problem of the sentence. verbs have distinct conjugations, or paperwork, for each issue pronoun, like I, you, he or she. Están is the 0.33 character plural form of the verb estar , also inside the present worrying, indicative mood.
Learn more about noun here:-https://brainly.com/question/17392892
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