in reply to Rebeca

@Rebeca @Chris Packham It is irregular. A regular verb in English has the following form:

Infinitive: (To) X
3rd person singular present indicative: Xs (or other standard plurals)
Gerund: Xing
Participle/preterit: Xed

And that’s it. There are some patterns of irregular verbs, but regular ones all have stem+ed as their past tense.