Hello, just a quick homework question.

How do you say: working for my sister's buisness - is it sister's with an apostrophe s or just s or apostrophe after s?

If there is only one sister, then use sister's (the singular possessive form).

If there are two or more sisters, then use sisters' (the plural possessive form).

Also -- watch the spelling -- it's business. You have the s and the i reversed.

Thank you very much

Hello! To determine how to properly express possession in a specific phrase, such as "working for my sister's business," you need to consider whether the sister is singular or plural. In this case, you are referring to a singular sister, so you should use the apostrophe and the letter "s" after "sister," like this: sister's.

Here's a breakdown of the different forms of possessive nouns:

1. Singular Possessive: Add an apostrophe and the letter "s" ('s) to the singular noun. For example:
- My sister's business.
- The dog's toy.

2. Plural Possessive: If the noun is plural and already ends in "s," you only need to add an apostrophe ('), without an additional "s" after it. For example:
- The sisters' business. (Referring to multiple sisters)
- The dogs' toys.

3. Plural Possessive (without an "s"): If the plural noun does not end in "s," you should add both an apostrophe and the letter "s" ('s). For example:
- The children's toys.

Remember, in your specific example, since you are referring to a singular sister, you would write "working for my sister's business."