Mrs Debase. (no apostrophe)
Mrs Debase's handbag. (Possessive apostrophe)
They'd.
Well if her name is "Agne" then the apostrophe would go here "Agne's ". However, if her name is "Agnes" then the apostrophe would go here "Agnes' "
There is no apostrophe in that sentence. It would be in: The scouts' tents.
The contraction for I would is I'd. I'd go see a doctor if I were you.
After the 's' - the ladies' bags.
there is no apostrophe is yours unless a person's/object's name was "Your" and you are talking about something belonging to Your, in which case it would be Your's
If it is required, the apostrophe would come after the Z but before the S. "This is Mr. Buzz's stinger!"
An apostrophe is not required.
You don't need an apostrophe in that sentence. Studentsis a plural word, not a possessive.
doctor's (more than one doctor)
The apostrophe goes before the "s" in "offenders," making it "offenders'." This indicates that something belongs to the offenders.
The apostrophe goes before the "o" in "Archaeologist" to indicate the missing letters in the word "Archaeology." The correct spelling is "Archaeologist."