In the following sentence, what is the function of "You"?

You, go to the store.

I know the sentence is in the imperative mood, and that generally means there is an implicit second-person subject. If we dropped the initial "You", the subject would be that implicit subject.

While "you" matches that second-person subject, that seems just incidental and it seems like it is just an expression of address that happens to match the implicit subject.

Is it the subject, or merely a vocative expression? Or in other words, is the subject the "You" in the sentence, or is it the implicit subject from the imperative mood?

  • 1
    The subject would often be taken to be the omitted 'you' also not appearing in 'Tom, [ ] go to the store'. 'You. Go to the store.' might be preferred by some. – Edwin Ashworth Apr 16 '15 at 10:13
  • I suppose 'you' could be the 'topic' of the utterance, followed by an instruction. But the subject of the sentence is still 'you', to answer the question in your title. – pazzo Apr 16 '15 at 11:19
  • The subject is an implicit "you". The implication is quite strong, of course, being provided by the initial "You," (whose technical part of speech I forget, since I haven't studied that stuff since 8th grade). – Hot Licks Apr 16 '15 at 11:44
  • That "You" in your example is a vocative. Here's a related answer post that might be helpful: Comma after address – F.E. Apr 23 '15 at 19:33

Assuming the comma in the OP is inserted correctly, it differentiates the vocative you with the imperative mood from the indicative mood, which would not include the comma:

  1. You go to the store.

Some argue that the indicative construction can behave as an imperative where You functions as an emphatic adjunct of the standard zero argument:

  1. You go to the store!

Inserting the comma invites us to interpret You as the vocative:

  1. You, go to the store.

Regardless, you is the syntactic pivot of the sentence:

The syntactic pivot is the verb argument around which sentences "revolve", in a given language. This usually means the following:

  • If the verb has more than zero arguments, then one argument is the syntactic pivot.
  • If the verb agrees with at least one of its arguments, then it agrees with the syntactic pivot.
  • In coordinated propositions, in languages where an argument can be left out, the omitted argument is the syntactic pivot.

If we concede poor punctuation and parse the You as an emphatic adjunct, the implied you would be expressed in the adjunct, and arguing over "which" you is the subject argument of go is much ado about nothing.

Since the You of the first phrase is vocative, the implied you is the subject argument of go. Again, it is much ado about nothing, because the vocative you and the implied you identify the same entity.

Extra note: Some argue that You is an introductory single word phrase reduced from I am talking to you or You pay attention. They recommend punctuation that removes the ambiguity with two sentences:

  1. You. Go to the store.

(I'm answering because I don't have the reputation to comment above.)

As people have mentioned, 'You' is not necessary as the subject and functions as a vocative case. Most likely, a speaker would utter a phrase such as this when speaking in the direction of several people. I picture the speaker pointing at one individual while making the statement. Additionally, any phrase beginning with "You, ..." should be viewed as potentially rude and seems, to me, to imply that the person speaking is in a hurry and in a position of authority.

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