Or dependency parsing. But unfortunately the English package in Apertium doesn't have a syntax CG (there are proprietary English syntax CG's out there, with syn

Or dependency parsing. But unfortunately the English package in Apertium doesn't have a syntax CG (there are proprietary English syntax CG's out there, with syntactic function labelling and dependency relations, while in Apertium there are syntax CG's for some other languages). OTOH, what's the goal? If you just want to flag some high-frequency constructions you can get quite far with very little depth.