Please check this Apostrophe:

1) Kates' sister
2) the giraffe's neck
3) the parent's anniversary
4)the senator's cars
5) Toms' folder
6) the deer's habitat

1. no

2. yes
3. only if there's one parent
4. only if there's one senator
5. no
6. yes

http://www.chompchomp.com/terms/apostrophe.htm

Half of them are right.

http://grammar.yourdictionary.com/parts-of-speech/nouns/Possessive-Nouns.html

To check if the apostrophes in these sentences are used correctly, we need to determine whether they indicate possession or if they are used for pluralization.

1) "Kates' sister" - This is incorrect. The apostrophe should be placed before the 's' to show possession. The correct form would be "Kate's sister" because it indicates that the sister belongs to Kate.

2) "the giraffe's neck" - This is correct. The apostrophe is correctly placed before the 's' to indicate possession. It means that the neck belongs to the giraffe.

3) "the parent's anniversary" - This is correct. The apostrophe is correctly placed before the 's' to indicate possession. It means that the anniversary belongs to the parent.

4) "the senator's cars" - This is correct. The apostrophe is correctly placed before the 's' to indicate possession. It means that the cars belong to the senator.

5) "Toms' folder" - This is incorrect. The apostrophe should be placed after the 's' only when indicating possession for plural nouns. However, "Tom" is a singular noun, so the correct form would be "Tom's folder" to show that the folder belongs to Tom.

6) "the deer's habitat" - This is correct. The apostrophe is correctly placed before the 's' to indicate possession. It means that the habitat belongs to the deer.

So, the corrected form should be:

1) Kate's sister
2) the giraffe's neck
3) the parent's anniversary
4) the senator's cars
5) Tom's folder
6) the deer's habitat