Both are "correct". They just have different subjects.
.
LONG ANSWER VERSION: Let's identify the subject of each interrogative clause, by using the verb's number as the indicator:
?1.a) Which one is you?
?2.a) Which one are you?
Notice that there is formal subject-verb agreement between the subject and verb in each version.
Let's verify that we've actually identified the subject, by looking at a related declarative clause for each of those above two interrogative clauses.
For #1.a. "Which one is you?":
?1.b) That one is you. -- [declarative clause]
?1.a) Which one is you? -- [interrogative clause]
The conversion from declarative #1.b to the interrogative #1.a was a straightforward change from "That one" to "Which one". The subject of both versions are before the verb.
For #2.a. "Which one are you?":
?2.b) You are that one.
?2.c) You are which one? -- [interrogative clause, interrogative phrase in situ]
?2.a) Which one are you? -- [interrogative clause, fronted interrogative phrase]
Notice that when the interrogative phrase ("which one") is fronted in a main clause, that causes obligatory subject-auxiliary verb inversion. That is what happened between the last two steps.
To verify this, we can use a multi-word verb phrase to see this subject-auxilary verb inversion working:
?3.a) You would be that one.
?3.b) You would be which one?
?3.c) Which one would you be?
Notice how the subject "you" ended up getting sandwiched between "would - be".
A similar exercise can be done with the subject "Which one", except there is no subject-auxiliary verb inversion because the interrogative phrase is the subject:
?4.a) That one would be you.
?4.b) Which one would be you?
.
Short story: One way to find the subject of an interrogative main clause is to convert the example sentence into one that uses a multi-word verb phrase. The subject will either be in the front before the verb phrase, or else it will be sandwiched in between the verbs.
Using the OP's two examples:
?1.) Which one is you?
?2.) Which one are you?
we see that the versions can be converted into the below:
?1.x) Which one will be you?
?2.x) Which one will you be?
Since the OP's two examples only had a single verb in them ("is" vs "are"), then as to what the subject is will, in this case, depend on the verb that is used -- for the speaker/writer will have used subject-verb agreement between the subject and verb.
So, the answer is: Both are "correct". They just have different subjects.
.
LONG ANSWER VERSION: Let's identify the subject of each interrogative clause, by using the verb's number as the indicator:
?1.a) Which one is you?
?2.a) Which one are you?
Notice that there is formal subject-verb agreement between the subject and verb in each version.
Let's verify that we've actually identified the subject, by looking at a related declarative clause for each of those above two interrogative clauses.
For #1.a. "Which one is you?":
?1.b) That one is you. -- [declarative clause]
?1.a) Which one is you? -- [interrogative clause]
The conversion from declarative #1.b to the interrogative #1.a was a straightforward change from "That one" to "Which one". The subject of both versions are before the verb.
For #2.a. "Which one are you?":
?2.b) You are that one.
?2.c) You are which one? -- [interrogative clause, interrogative phrase in situ]
?2.a) Which one are you? -- [interrogative clause, fronted interrogative phrase]
Notice that when the interrogative phrase ("which one") is fronted in a main clause, that causes obligatory subject-auxiliary verb inversion. That is what happened between the last two steps.
To verify this, we can use a multi-word verb phrase to see this subject-auxilary verb inversion working:
?3.a) You would be that one.
?3.b) You would be which one?
?3.c) Which one would you be?
Notice how the subject "you" ended up getting sandwiched between "would - be".
A similar exercise can be done with the subject "Which one", except there is no subject-auxiliary verb inversion because the interrogative phrase is the subject:
?4.a) That one would be you.
?4.b) Which one would be you?
.
Short story: One way to find the subject of an interrogative main clause is to convert the example sentence into one that uses a multi-word verb phrase. The subject will either be in the front before the verb phrase, or else it will be sandwiched in between the verbs.
Using the OP's two examples:
?1.) Which one is you?
?2.) Which one are you?
we see that the versions can be converted into the below:
?1.x) Which one will be you?
?2.x) Which one will you be?
Since the OP's two examples only had a single verb in them ("is" vs "are"), then as to what the subject is will, in this case, depend on the verb that is used -- for the speaker/writer will have used subject-verb agreement between the subject and verb.
So, the answer is: Both are "correct". They just have different subjects.
选择“Disable on www.wenxuecity.com”
选择“don't run on pages on this domain”
