From a book I'm reading:
"four months' pregnant"
That's clever (I mean, incorrect) apostrophe usage. It might at first seem to be similar to "four weeks' worth," which does require an apostrophe. However, if you put each of these in the singular, it's easy to tell where an apostrophe is warranted:
one month pregnant
one week's worth
You wouldn't write one month's pregnant, nor would you write one week worth.
Ask Me a Question
If you have a writing, grammar, style or punctuation question, send an e-mail message to curiouscase at sign hotmail dot com.
Add Your Own Criminal Sentence!
If you find a particularly terrible sentence somewhere, post it for all to see (go here and put it in the Comments section).