Answer:
The word apostrophe forms a normal plural as apostrophes.

The possessive forms would be:
apostrophe's (singular) - "The apostrophe's use in contractions is fairly standardized."
apostrophes' (plural) - "The apostrophes' positions are wrong in some of his words."
First answer by ID1270194606. Last edit by Dfoofnik. Contributor trust: 2548 [recommend contributor recommended]. Question popularity: 2 [recommend question].