sentences: aluminum cans are made of aluminum & aluminum is recyclable -> tin telling are recyclable aluminum cans are recyclable  tin telling are recyclable & recyclable means a material can be recycled / reused many times -> aluminum cans can be recyled many times aluminum cans can be recyled many times  aluminum cans can be recyled many times & an tin can is a mean of preposition & an example of recycling is using an object to make a new object -> using aluminum cans to make a new object is an example of recycling