The possessive form for the noun theory is theory's.
Example: The theory's basis is founded on scientific principles.
The plural form of the noun theory is theories.The plural possessive form is theories'.example: All of his theories' validity is questionable.
Neither, teachers' is a plural possessive commonnoun.singular common noun: teacherplural common noun: teachersplural possessive common noun: teachers'Counter example:singular proper: Franklinplural proper: Franklinsplural proper possessive noun: Franklins'
The possessive form for the plural noun teachers is teachers'.Example: The teachers' conference is scheduled for Friday.
The possessive form of the noun teacher is teacher's.
The possessive form of the singular noun teacher is teacher's.Example: I put your note on the teacher's desk.The plural form of the noun teacher is teachers.The plural possessive form is teachers'.Example: The teachers' meeting is scheduled for three.
The plural form of the noun theory is theories.The plural possessive form is theories'.example: All of his theories' validity is questionable.
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.
No, it is a singular possessive noun.