Friday, August 14, 2015

grammatical number - "They're using a cell phone" vs. "They're using cell phones"



The usage of singular and plural has always been confusing for me.



I often see sentences like these






  1. People are using cell phones.

  2. People are using a cell phone.




Does the first sentence mean everyone has a phone and they are all using their own?
Does the second sentence mean they are sharing one cell phone?



If I see a group of people holding a cell phone in their hand(s), <- even this is confusing for me, should I use the first sentence then?




Another example: you see two men, and both of them are carrying a bag. Which sentence should I say/use?





  1. They are carrying backpacks

  2. They are carrying a backpack





Could you please make it clear for me?


Answer



This aspect of grammar is called the distributive plural. Swan in Practical English Usage (p530) has the following discussion:




Singular and plural: distributive plural



1. people doing the same thing



To talk about several people doing the same thing, English usually

prefers a plural noun for a repeated idea.




  • Tell the kids to bring raincoats to school tomorrow.


  • (More natural than Tell the kids to bring a raincoat ...)




Plural forms are almost always used in this case if there are
possessives.





  • Tell the children to blow their noses. (not ... to blow their nose.)

  • Six people lost their lives in the accident.




Quirk et al. in A Comprehensive Grammar of the English Language (p768) list two similar examples:






  • Have you all brought your cameras? [Each has a camera.]


  • Hand in your papers next Monday. [Each has to hand in one paper.]





and agree with Swan that "... the distributive plural is the norm ...".



But the CGEL goes on to state that:





... the distributive singular may also be used to focus on individual
instances. We therefore often have a number choice.




  • Some children have understanding fathers / an understanding father.


  • We all have good appetites / a good appetite.





The CGEL concludes its discussion as follows:





The singular is sometimes used to avoid ambiguity:




  • Students were asked to name their favorite sport.



The singular makes it clear that only one sport was to be named. Similarly:





  • Children must be accompanied by a parent.




Turning to the OP's example, the speaker has a 'number choice'. While, according to Swan and Quirk, the plural is the more usual form (People are using cell phones), the singular (People are using a cell phone) can also be used 'to focus on individual instances'.



As for the recipient of the message, their world-knowledge will most likely lead them to interpret both sentences identically, namely that each person is using his or her own single phone. People don't usually use more than one phone at a time, and people even less usually jointly and simultaneously use a single phone.



The same reasoning applies to the backpack example. Our experience of the world tells us that people almost always carry a single backpack and almost never share the carrying of a single backpack.




It is incumbent, therefore, on the maker of the message to anticipate when our real-world experience may lead us to the wrong interpretation or when the message is inherently ambiguous and a correct interpretation is important. In both such cases, the message needs to be phrased in such a way as to be clear to the recipient how many of the items are involved for each of the people.



For example:





  • Two people and one backpack: They are carrying a backpack between
    them
    .


  • People, all using more than one phone: People are using each of their

    phones
    .




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