Quote:
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Originally Posted by Grablevskij But let us scrutinize this subject: whose job it is to repair the pipes.
What part of a sentence is "it"? |
It belongs to the blue clause,
it is to repair the pipes, where it functions as the subject of the verb
is.
Our example sentence
A plumber is a person whose job (it) is ...
We know that the (pro)noun closest to the verb acts as its subject, so distance or proximity cancels out
whose job as the subject of the verb
is. So, you see, the question isn't what role does the pronoun
it play--we know it's the subject. The question is, or rather, the questions are, what function does the phrase
whose job play in the structure if
it is the subject, and why is
it inserted in the first place?
First, we know that relative pronouns can function as either subjects or objects:
This is the house
whose roof is leaking. <subject>
This is the house
whose roof I repaired. <object>
Second, we know that sentences containing expletive
it relocate or displace the subject of the sentence:
1a.
To repair the pipes is a plumber's job. <subject>
1b.
It is a plumber's job to repair the pipes. <subject>
2a.
A plumber's job is to repair the pipes. <subject>
2b.
It is a plumber's job to repair the pipes. <subject>
Note, there's no difference semantically between 1b and 2b. Remove the expletive and the resulting sentences are semantically vacuous:
A plumber's job is to repair the pipes. <subject>
To repair the pipes is a plumber's job. <subject>
But they are different structurally. The bold phrases function as subjects. Everything after the BE verb functions as a subject complement (as objects, if you will).
Third, for the sake of brevity, take examples 2a and 2b and make them into relative clauses (RC).
2a.
A plumber's job is to repair the pipes. <subject>
RC: ...
whose job is to repair the pipes. <subject>
Syntactically, nothing spectacular happens here.
Whose job replaces the subject
a plumber's job and takes over its position and function as the subject of the RC verb
is.
2b.
It is a plumber's job to repair the pipes. <subject>
RC: ...
whose job it is to repair the pipes. <subject compl.>
Syntactically, something spectacular happens here.
Whose job replaces and takes over the function of the phrase
a plumber's job, a subject complement. That's the difference between 2a's RC and 2b's RC.
Whose job is a subject complement (an object, if you will); moreover, and here's why the subject pronoun
it is added, the subject complement is moved out of the verb phrase to the head of the RC, where it is disconnected from the verb phrase. Structurally,
whose job appears to function as the subject of the verb
is because it's sitting right next to it, but semantically it's not the subject, it's a subject complement, and so, in order to maintain that semantic connection, a boundary marker, an empty subject (
it) is inserted between
whose job and the verb
is, telling us that
whose job isn't the subject of the verb even though its position in the structure makes it appear that way.
In short,
1c. A plumber is a person
whose job is ... <subject>
2c. A plumber is a person
whose job it is ... <subject compl. +
boundary marker>
What are your thought?