Hi.
She made the same mistake [as her sister did].
What's the form and function of the underlined constituent?
To me, it's a relative pronoun in form class functioning as the subject/head of the relative clause in bracket.
Persian Learner mistake [as her sister did] A relative pronoun (form). A subject in a subordinate clause (function). By the way, "the same mistake as her sister did" is a noun phrase (form) and direct object (function).
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Persian Learnermistake [as her sister did]
A relative pronoun (form).
A subject in a subordinate clause (function).
By the way, "the same mistake as her sister did" is a noun phrase (form) and direct object (function).
Persian Learnerform and function
relative pronoun; direct object (of 'did make').
CJ