Add -s
run → runs · go → goes · watch → watches · study → studies
Mechanics · Endings
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run → runs · go → goes · watch → watches · study → studies
work → worked · stop → stopped · study → studied
make → making · run → running · study → studying
drop silent e · double after short vowel · consonant+y changes before s/ed
Notice the same spelling logic returning across grammar systems.
La terminación depende del final de la palabra.