Apostrophe

Apostrophe

The apostrophe is used in three ways:
· to mark the omission or elision of letters and
sounds as in don't (do not)
· to indicate a plural form, especially in abbreviations as in NQT's
· to mark possession in nouns, as in the boy's hat; the teachers' notebooks.
Use of punctuation changes along with other aspects of language. The use of an apostrophe to indicate a plural in the second example above is still `correct' but becoming less universal.
E-mail has led to a modification in the use of punctuation.