Subject condition

Definition
Subject Condition is a Condition on Extraction Domain, stating the impossibility of extraction from subjects.

Example
This condition accounts for the ill-formedness of (i) and (ii), where who and what are extracted from the subject of the complement sentence.

(i) *	I wonder who [IP [books of t] are on the table] (ii) *	I wonder what [IP [reading t] would be boring]

Links

 * Utrecht Lexicon of Linguistics