Types of control

In the literature on control, two types are often distinguished: obligatory control, as in sentences ((55)), ((56)), ((57)), and ((58)) and optional control, as in sentence ((59)).

(54)0(54

(55)

Srini_i promised Mickey_i [PRO_i to leave].  (55)0(55

(56)

Srini persuaded Mickey_i [PRO_i to leave].  (56)0(56

(57)

Srini_i wanted [PRO_i to leave].  (57)0(57

(58)

Christy_i left the party early [PRO_i to go to the airport].  (58)0(58

(59)

[PRO_arb/i to dance] is important for Bill_i. 

At present, an analysis for obligatory control into complement clauses (as in sentences ((55)), ((56)), and ((57))) has been implemented. An analysis for cases of obligatory control into adjunct clauses and optional control exists and can be found in [#!bhatt94!#].