Suggested Answers for Check Questions
Both negation and VP adverbs can precede the tense element but they can never precede the modal in I. Furthermore, neither negation nor VP adverbs can adjoin to a VP whose head has moved out of it. VP adverbs can also adjoin to any vP while negation will have to appear between the tense vP and the rest of the vP or VP. In addition a VP adverb can also be adjoined to I-bar (i.e. it does appear before a tensed verb) when there are only two options available for it in a clause: either it precedes tense or follows the thematic verb. This situation arises in clauses that contain only one verb form (e.g. They always met in the park).