whichever you use, don't forget to put periods after each letter

kadioguy

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You can usually avoid using i.e. by using instead the phrase "that is" or "in other words." But whichever you use, don't forget to put periods after each letter and a comma before and after: "Here you are with your picture flashed on the big screen at America's busiest intersection, i.e., Broadway and 42nd Street!"

https://www.vocabulary.com/dictionary/i.e.
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Is it correct? I think only i.e fits this statement; "that is" and "in other words" do not.
 

jutfrank

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i.e. is not usually the first word in its sentence whereas that is and in other words frequently are.

You should put a comma after all three options. Obviously, you don't put a comma before if it's the first word in the sentence. Even more obviously, only i.e. needs periods after each letter.
 

Rover_KE

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Increasingly, in British English, you will see ie, eg and etc without full stops (periods), but I advise students not to follow this practice: it may cost you a good mark in your written work.
 
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