Control

$\langle$control$\rangle$ has no value and is used only for indexing purposes. The root node of every clausal tree has its $\langle$control$\rangle$ feature coindexed with the control feature of its subject. This allows adjunct control to take place. In addition, clauses that take infinitival clausal complements have the control feature of their subject/object coindexed with the control feature of their complement clause S, depending upon whether they are subject control verbs or object control verbs respectively.