The possessive form for the noun cook is cook's.
the tent
The word cooks is a common plural noun. It requires no apostrophe.All cooks work in kitchens.If the word cooks has a possession or belonging, it needs an apostrophe.I found the cooks' time sheet in the garbage.The cooks' fingernails were dirty.
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 is grandson's.
The possessive form is island's.
The possessive form for the noun coyote is coyote's.