As Bob said Word can not know when a sentence has finished but you can do a
check yourself.
BUt it can check for obvious omissions, if you have "Check Grammar as you
type" on (under Tools, Options, Spelling & Grammar), and you have Punctuation
checked in the Settings listing, then Word can show you when a punctuation
mark is missing and for the most part works quite well.
To find the occasion of when a Period is missing at the end of a paragraph
use can use the Find function to help.
Using Find, enter ([!\?.:])^13, check Use wildcards in the More options,
this will find any end of paragraph that does not have a Question Mark
Period, or Colon before the Paragraph Mark. Obviously you can use the Replace
function to add the missing punctuation. Add \1.^p into the replace box, (use
^p for the paragraph mark as ^13 seems to affect formating, don't know why)
to add a Period before the Paragraph Mark.
Hope this helps
DeanH
