Answer:

tenses

Answer	Crossword Clue
TENSES	Past and imperfect
TENSES	Freezes up
TENSES	Grammarian's concern

TENSES	Conjugation concerns
TENSES	Reacts to a strange noise, perhaps
TENSES	Stiffens
TENSES	Past, present and future
TENSES	Reacts to a threat
TENSES	Time indicators of a sort
TENSES	Present and past
TENSES	Present and past, e.g.

TENSES	Verbal divisions
TENSES	Past and present
TENSES	Perfect and present
TENSES	Tightens up
TENSES	Past and present, e.g.
TENSES	Shows fear
TENSES	Past, present, and future
TENSES	The past and the future

TENSES	Past and future
TENSES	Grammar concerns
TENSES	Grammarian's concerns
TENSES	Verb forms
TENSES	Grammar categories
TENSES	Gets nervous
TENSES	Becomes uptight
TENSES	Forms of a verb

TENSES	Shows distress
TENSES	Pluperfect and future
TENSES	They may be perfect
TENSES	Future, present and past
TENSES	Grammar class subjects
TENSES	Some are imperfect
TENSES	Pluperfect and others
TENSES	Past, present, future.

TENSES	Verb forms.
TENSES	Future and perfect.
TENSES	Verb inflections.
TENSES	Present and future.
TENSES	Past and present.