English Grammar in Use Unit 5 Past simple (I did)

過去形（past simple）

動詞の過去形

原形に ed をつけた形が多い（work → worked, invite → invited, decide → decided...）

スペリングに注意なのが

stop → stopped, study → studied

不規則動詞

write → wrote

see → saw

go → went

shut → shut

疑問形と否定形は did / didn't に原形

Did you go out last night?

I didn't do anything.