I allow her to go. - but -Can anyone think of any reason why such irregularity exists?
I let her go. (not to go)
I think here "let" is a modal auxiliary, and except for "ought to", they are followed by a bare infinitive. You'll find the same construction after "help", "make" (causative), and perhaps others, but I don't know the explanation for it, just that it's a grammar rule
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
PieanneWhy not say it's a transitive verb (synonym of "allow") that requires a bare infinitive? But I'm not a grammar pro...True. "Let" is certainly a transitive verb that requires a bare infinitive. I myself don't know the exact definition of "causative verbs". Please give me a time to ponder about it.
Paco2004"Let" is one of causative verbs that take the construct of [<verb> <sb> <do>]. "Have"and "make" belong to the same class of causative verbs. "Allow", "cause", "force", "get", and "permit" are also causative verbs, but they take the construct of [<verb> <sb> <to do>]. "Help" is also kind of causative verb and it can be used