Before I given an example of a sample sentence showing both words, let us dissect the meaning of each word first. The definitions/ synonyms are as follows:
Legacy- inheritance, heritage, birthright, bequest
Eaves- the roof’s lower border which overhangs the wall or a projecting edge (as of a hill)
Sample Simple Sentence: Maria was already struggling on the edge and still thinking about her legacy.
(It’s rather a challenge to create a sentence using these words which could make a lot of sense, but that’s the best I could pull off.) Hope that helps :)