V n about n
Other related patterns
V n amount about n
The verb is followed by a noun group, an amount, and a prepositional phrase beginning with about. The passive pattern is be V-ed amount about n.
She taught me a lot about plants.
The preposition about is sometimes followed by an '-ing' clause or a wh-clause.
He was a good man who taught me a lot about living on the planet and making the most of it.
In the case of trouble, the noun group is always a reflexive pronoun. The pattern is V pron-refl amount about n..
teach tell trouble
Bernard troubles himself very little about politics.