The possessive form of the plural noun departments is departments'.
example: All of the departments' heads will be at the meeting today.
The apostrophe always comes after the word, but is not always followed by a "new s". The singular "department" forms its possessive with "apostrophe s". However, following "spoken word" guidelines, the plural "departments" can form its possessive without adding the "s", which would create an unwieldy spoken form. Singular : department / department's Plural : departments / departments' (attributes of more than one department) (Both possessive forms share an identical pronunciation "departments", and would require an enumerating adjective such as "all", "one", etc. to distinguish them.)
The possessive form of "he" is "his": He did his homework after dinner.
No, it is singular, the possessive form of it is its. The plural form of it is they or them, and the possessive form is their.To answer the question directly: there is no such word as ITS'.
The possessive form is lawyer's.
The possessive form is posse's.
The possessive form is whistle's.
The plural possessive form is Luis's.
The singular possessive form of the noun "it" is "its". Note that there is no apostrophe in the possessive form of "it". The apostrophe is only used after "it" when used as a contraction of "it is".
The singular possessive form is heart's; the plural possessive form is hearts'.
The possessive form for the noun freedom is freedom's.
The possessive form is my sister's friend.
The possessive form for the noun science is science's.