[Corpora-List] Grammar checker for English

[D.G.Damle]

Does anyone have a technique or tool for checking the grammatical correctness of a sentence?

I want to substitute the compound words in WordNet (2.0) for the corresponding multiple words in my corpus.  However, WordNet has compounds  such as 'have not' (NOUN) which is only relevant in specific contexts.  I think that checking the grammticality of the sentence after substitution may act as a check on the correctness of the substitution (at least where there is a change in category).  

A full parser would be computationally too expensive, so is there a computationally cheap method for this?

Dileep Damle
Open University, PhD student