The word it's (with an apostrophe) is not a possessive pronoun -- it is a contraction of the phrase "it is." The possessive is its (without the apostrophe).
Examples:
It's not fair that some teachers give more homework than others.
Take your umbrella because it's going to rain.
I am not writing a sentence using that word.
a sentence using the word endotracheal
This is a sentence using the word aviator.
this is a sentence using the word armchair.
I am saying a sentence using the word collagen.
Please type a sentence using the word assertion.
Need a sentence using the word crater?
Can you give sentence by using abyss word?
This is an example of a sentence using the word breakfast.
I can write a sentence using the word scorn!
That is a sentence using the word troops.
Yes, a sentence can be made using the word "subaquatic". An example in a sentence of the word in the sentence "a marginal subaquatic flora".