Dashes
Two dashes are used when breaking off a sentence to insert an after thought or an explanatory comment or short list:
e.g. In August last year- I was with my family at the time- I had a serious accident. Nothing-food, plates, cutlery, pan's-could be left unattended.
A single dash may be used.
(a) When breaking off a sentence for an abrupt change of thought or when "tagging on" another construction:
e.g. The following day we had better luck - but that is another story.
(b) To emphasize a repeated word:
e.g. The new regime imposed rigid laws-laws which the police found difficult to enforce.
(c) When bringing together a number of items:
e.g. Tooth brush, can-opener, matches, soap pads-these are often forgotten by inexperienced campers.
