V at n
V at nThe verb is followed by a prepositional phrase which consists of at and a noun group. With some verbs, the preposition is sometimes followed by an '-ing' clause or a wh-clause. The passive pattern is be V-ed at.This pattern has two structures:
Structure I: Verb with prepositional ComplementUnemployment is running at 17 per cent.
Structure II: Verb with prepositional ObjectThey swore at him.