Lists
Usually a list has a lead in sentence that tells the reader that what follows is a list of things. If the lead-in sentence is a complete sentence, and suggests that a list follows it, you can end it with a colon. Otherwise, you can use a dash, or even no punctuation mark.
Complete ‘suggestive’ lead-in sentence:
There are several modes of transport available for people in our city, as follows: buses, trains, and taxis.
After the complete lead-in sentence, there is a colon. After each item in the list, there is a comma, and after the second last item there is also an ‘and’. There is a period after the last item.
Incomplete lead-in sentence:
There are several modes of transport in this city - buses, trains, and taxis.
Because the lead-in sentence doesn’t really suggest directly that a list comes after it, we use a dash rather than a colon.
When each item in the list is a complete sentence, you can use semicolons, instead of commas, after each point:
We are worried about several transport issues. These points were raised in the last meeting: there is a shortage of buses late at night in the city; vandals are frequenting the trains on weekends; and bashings of taxi drivers continue to occur.
I prefer not to capitalise the start of each point in an inline list, unless it needs to be because of some capitalisation rule (for instance, if a point starts with someone’s name).
You can also number a list if you want to emphasise the order that the list is presented in:
We are worried about several transport issues. Three points were raised in the last meeting: (1) there is a shortage of buses late at night in the city; (2) vandals are frequenting the trains on weekends; and (3) bashings of taxi drivers continue to occur.
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