Basic Rules Of English Grammar (PUNCTUATION MARKS AND CAPITALISATION)
The full stop is primarily used to end a sentence. It is also used after initials, for abbreviations, personal titles of address, acronyms and initials. • Use the full stop at the end of a complete sentence that is a statement. Example:...
When her seedy and importunate Aunt Elena turns up on her doorstep at midnight having been burned out of her old people's home, V.I. Warshawski is exasperated rather than curious. Her interest is aroused however, when an old friend, now a politician, puts pressure on her to investigate.