@article{oai:repository.dl.itc.u-tokyo.ac.jp:00039231, author = {Kato, Takaomi}, journal = {Linguistic research : working papers in English linguistics}, month = {Dec}, note = {application/pdf}, pages = {13--30}, title = {Don't Negate Imperatives! : Interpretability of Clause Type Features}, volume = {17}, year = {2000} }