Even though it doesn't have an apostrophe, its is the possessive form of the word it, which is a pronoun rather than a noun.
It's is the short form for it is.
The words its and it's confuse many people because most English words make their possessive form by adding " 's ", but personal pronouns are an exception to that rule. That exception is why we write hers instead of "her's" or yours instead of "your's".
If you're not sure which one to use, remember that it'sis short for it is. If the sentence makes sense with "it is" instead, use it's. Otherwise, use its. For example, which is correct?
If you replace it's with it is in the first sentence, it becomes "The dog ate it is dinner." which is gibberish. That means the second sentence has the correct usage.
No, he is not possessive. The possessive form would be his.
The possessive noun of Sam is Sam's.
The possessive noun for "diplomat" is "diplomat's." For example: The diplomat's speech was well-received.
No, "she's" stands for she is. The singular possessive noun for a female is her or hers.
The possessive form for the plural noun wives is wives'.
The possessive singular noun is explorer's. The possessive plural noun is explorers'.
The possessive form for the noun coyote is coyote's.
The possessive form of zoo is zoo's.
The possessive form for the noun preacher is preacher's.
The possessive form for the noun laboratory is laboratory's.
No, he is not possessive. The possessive form would be his.
The possessive form for the noun oxygen is oxygen's.
The possessive form for the noun coyote is coyote's.
The possessive form is grandson's.
The possessive form is island's.
No, it is a singular possessive noun.
The possessive noun of Sam is Sam's.