No, the word "that" does not require an apostrophe to show possession. The possessive form of "that" is simply "that's."
An apostrophe is used in contraction. Example: you will: you'll
no.
Where the apostrophe goes in the word "members" depends on how you intend to use it. If it simply meant to be pluralized, there is no apostrophe. For example: The members decided to leave. If it is meant to be singular possessive, the apostrophe goes after the r. For example: The member's fees were not paid. If you mean to make it plural possessive, the apostrophe goes after the s. For example: The members' retreat was extremely relaxing.
Use the apostrophe right after the letter s: fighters'
Use an apostrophe only (without the s) to the word parents if it indicates possession. Example: parents' house
When it is a possessive, use apostrophe. The waitress's coat was stolen. The waitresses' paychecks were cut.
The apostrophe in the word Billy's means Billy's ownership of something.
If you are indicating possession (Achilles' heal) use an apostrophe at the end of the word. If you are simply stating his name, there is no apostrophe.
Use an apostrophe after the word actors if it indicates possession. Example: actors' guild
You wouldn't need to add an apostrophe because the plural of wolf is wolves
Use an apostrophe in the word only if you are using the contraction of the two words it and is. It's time to go! It was wagging its tail.