aisle / i'll / isle are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
aisle: (noun) a long narrow passage (as in a cave or woods). (noun) passageway between seating areas as in an auditorium or passenger vehicle or between areas of shelves of goods as in stores. (noun) part of a church divided laterally from the nave proper by rows of pillars or columns.
i'll: NA
isle: (noun) a small island.
aisle: AY·l
i'll: AY·l
isle: AY·l
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)