tense auxiliary

15 LETTERS · STARTS WITH T

tense auxiliary is a valid 15-letter word worth 24 points in Scrabble and 26 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

T1E1N1S1E1A1U1X8I1L1I1A1R1Y4

1 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 8 + 1 + 1 + 1 + 1 + 1 + 4 =24 PTS

DOUBLE WORD → 48TRIPLE WORD → 72

MEANING

What does tense auxiliary mean?