Why is it “half an hour” instead of “a half hour”?

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Today our lecturer said that we were gonna have "half an hour" break. Initially I thought it's a mistake and it should be "a half hour" but latter I was told that it's correct. Assuming that it's indeed correct, my question is why we put the article ("an)" after the quantifier rather than before it. (such as: "a one person" rather than "one a person")







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    Today our lecturer said that we were gonna have "half an hour" break. Initially I thought it's a mistake and it should be "a half hour" but latter I was told that it's correct. Assuming that it's indeed correct, my question is why we put the article ("an)" after the quantifier rather than before it. (such as: "a one person" rather than "one a person")







    share|improve this question
























      up vote
      1
      down vote

      favorite
      1









      up vote
      1
      down vote

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      1






      1





      Today our lecturer said that we were gonna have "half an hour" break. Initially I thought it's a mistake and it should be "a half hour" but latter I was told that it's correct. Assuming that it's indeed correct, my question is why we put the article ("an)" after the quantifier rather than before it. (such as: "a one person" rather than "one a person")







      share|improve this question














      Today our lecturer said that we were gonna have "half an hour" break. Initially I thought it's a mistake and it should be "a half hour" but latter I was told that it's correct. Assuming that it's indeed correct, my question is why we put the article ("an)" after the quantifier rather than before it. (such as: "a one person" rather than "one a person")









      share|improve this question













      share|improve this question




      share|improve this question








      edited Sep 6 at 2:39









      Eddie Kal

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      3,88821439










      asked Sep 5 at 22:53









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          2 Answers
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          "half an hour" is an abbreviation for "half [of] an hour".



          The phrase "half of" is quite common: "half of the people in the auditorium", "half of the cake", etc. In fact, "half of" is so common your brain may automatically insert "of" after "half". So then "of" is elided.






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            Both half an hour and a half hour are fine. They are acting as adjectival phrases for the noun break.




            Without an adjectival phrase, you would simply say:




            We are going to have a break.




            A break is countable (you can have one break, two breaks, or more). So, it has an article in front of it.




            Depending on which version of adjectival phrase you use, it will either come before break or after it.




            We are going to have a break of half an hour.

            We are going to have a half-hour break.







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              2 Answers
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              active

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              2 Answers
              2






              active

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              active

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              active

              oldest

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              up vote
              6
              down vote













              "half an hour" is an abbreviation for "half [of] an hour".



              The phrase "half of" is quite common: "half of the people in the auditorium", "half of the cake", etc. In fact, "half of" is so common your brain may automatically insert "of" after "half". So then "of" is elided.






              share|improve this answer


























                up vote
                6
                down vote













                "half an hour" is an abbreviation for "half [of] an hour".



                The phrase "half of" is quite common: "half of the people in the auditorium", "half of the cake", etc. In fact, "half of" is so common your brain may automatically insert "of" after "half". So then "of" is elided.






                share|improve this answer
























                  up vote
                  6
                  down vote










                  up vote
                  6
                  down vote









                  "half an hour" is an abbreviation for "half [of] an hour".



                  The phrase "half of" is quite common: "half of the people in the auditorium", "half of the cake", etc. In fact, "half of" is so common your brain may automatically insert "of" after "half". So then "of" is elided.






                  share|improve this answer














                  "half an hour" is an abbreviation for "half [of] an hour".



                  The phrase "half of" is quite common: "half of the people in the auditorium", "half of the cake", etc. In fact, "half of" is so common your brain may automatically insert "of" after "half". So then "of" is elided.







                  share|improve this answer














                  share|improve this answer



                  share|improve this answer








                  edited Sep 6 at 0:34

























                  answered Sep 5 at 23:51









                  Sam

                  2,36159




                  2,36159






















                      up vote
                      2
                      down vote













                      Both half an hour and a half hour are fine. They are acting as adjectival phrases for the noun break.




                      Without an adjectival phrase, you would simply say:




                      We are going to have a break.




                      A break is countable (you can have one break, two breaks, or more). So, it has an article in front of it.




                      Depending on which version of adjectival phrase you use, it will either come before break or after it.




                      We are going to have a break of half an hour.

                      We are going to have a half-hour break.







                      share|improve this answer
























                        up vote
                        2
                        down vote













                        Both half an hour and a half hour are fine. They are acting as adjectival phrases for the noun break.




                        Without an adjectival phrase, you would simply say:




                        We are going to have a break.




                        A break is countable (you can have one break, two breaks, or more). So, it has an article in front of it.




                        Depending on which version of adjectival phrase you use, it will either come before break or after it.




                        We are going to have a break of half an hour.

                        We are going to have a half-hour break.







                        share|improve this answer






















                          up vote
                          2
                          down vote










                          up vote
                          2
                          down vote









                          Both half an hour and a half hour are fine. They are acting as adjectival phrases for the noun break.




                          Without an adjectival phrase, you would simply say:




                          We are going to have a break.




                          A break is countable (you can have one break, two breaks, or more). So, it has an article in front of it.




                          Depending on which version of adjectival phrase you use, it will either come before break or after it.




                          We are going to have a break of half an hour.

                          We are going to have a half-hour break.







                          share|improve this answer












                          Both half an hour and a half hour are fine. They are acting as adjectival phrases for the noun break.




                          Without an adjectival phrase, you would simply say:




                          We are going to have a break.




                          A break is countable (you can have one break, two breaks, or more). So, it has an article in front of it.




                          Depending on which version of adjectival phrase you use, it will either come before break or after it.




                          We are going to have a break of half an hour.

                          We are going to have a half-hour break.








                          share|improve this answer












                          share|improve this answer



                          share|improve this answer










                          answered Sep 6 at 1:03









                          Jason Bassford

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                          8,7301926



























                               

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