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助动词have (has）+ done 过去分词
1.Most verbs
open→ opened
2.Verbs ending in -e
change → changed
3.Verbs ending in a consonant + y
carry → carried
4.Short verbs ending in a vowel + a consonant
stop → stopped
+ed
+d
-y +ied
double the
consonant +ed
want— work—
need— clean— like— live—
use— move— stop— trip— drop — plan —
study— carry—
hurry— marry—
wanted
worked
needed
cleaned
liked
lived
used