 Re: past participle + preposition
‘To develop’ is an infinitive, functioning as an adjectival modifier of ‘grammar’.
“Based’ is the participial adjective; ‘on’ is the preposition. The last part of the sentence is more easily understood if we develop ‘based on the linguistic input they receive’ into a full clause: ‘…which pre-programs them to develop grammar that is based on the linguistic input they receive.’ |