A poem I am scanning has the word "in" stressed at one point in the poem, but just a few lines below it the "in" is not stressed. Is this because the poet sees it as said differently, with different stress, as I presume? Is the word "in" a particular word that can have different ways of saying the stress?
How many other words, like "in", are stressed differently at certain times than others? I looked and it was not many. I hope someone can offer some advice on this as it is a nagging problem for me. I am new to poetry.