използвани

In a sentence

• Тези материали са използвани за направата на продукта.

  These materials have been used for the creation of the product.

  Here, 'използвани' denotes that the materials were utilized or applied in creating the product.

• Списъкът съдържа най-често използвани методи.

  The list contains the most frequently used methods.

  In this sentence, 'използвани' serves as an adjective describing 'методи' (methods), indicating that they are the ones frequently employed.

• Файловете трябва да бъдат използвани внимателно.

  The files must be used carefully.

  Here, 'използвани' implies an action that should be performed on the files, namely to use them with caution.