1. 74.406 Natural Language Processing Features Passives Questions Gaps Movement

2. Sample Rule: (VP)  (V SUBCAT -np-vp:inf) (NP) (VP VFORM inf) Verb SUBCAT Feature

3. Sample Rule: (VP)  (V SUBCAT -np-pp:loc) (NP) (PP PFORM LOC) Prep. Phrases PFORM Feature

4. Sample Rule: (VP)  (V SUBCAT -np-pp:loc) (NP) (PP PFORM LOC) More Verb SUBCATs

5. Auxiliaries COMPFORM Feature

6. VP  (AUX COMPFORM ?s) (VP VFORM ?s) "be" + progressive progressive VP  (AUX[be]) (VP[ing], +pass) "The box is being moved." VP[+pass]  (AUX[be]) (VP[pastparticiple], main) "The box has been moved."

7. VP  (AUX[be]) (VP[ing],+pass)"The box is." VP [ pastprt, +pass, ]  V[_np, pastprt]"... moved." VP [ing, +pass]  (AUX[[be,ing], pastprt ] ) (VP[pastprt], +pass ) "The box is being." VP[pastprt, +pass, +gap]  V[_np, pastprt, +gap ] "... moved." Integrate gap-indicator:

9. Passive - Example

10. Movement

16. Parsing Questions - Example