Many people are unsure about when to use the abbreviation i.e. and when to use e.g. First, let’s look at what these abbreviations stand for.
Contrary to popular belief, the initials i.e. do not stand for Internet Explorer! They stand for “id est,” which is Latin for “that is to say” or “in other words.” E.g. means “for example” or” such as.” Its Latin derivative is “exempli gratia.” (If you want to abbreviate Internet Explorer, use the capital letters IE.)
Using these in a sentence, we would say, Darren has a strong background in science (i.e., he has studied physics and chemistry.) Or Darren has an extensive vocabulary (e.g., he can think of 25 different synonyms for awesome or amazing.)
Note that you always want to insert periods with i.e. and e.g. and then to use a comma afterwards.
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