Look at this example. The group s strength lies in its commitment to the visitor industry. The group s strength lies in its commitment to the visitor industry. All apostrophes indicate that something has been missed out. A long time ago the English language was used very differently to the way it s used now.
Some nouns have plurals that don t end in s , e.g., children .
I ve got a week s holiday. I ve got six weeks holiday. They want 48 hours notice. The pronouns mine, yours, his, hers, its, ours, yours, theirs are already possessive, so don t use an apostrophe. Students often use an apostrophe incorrectly when the word is a simple plural.