I did it
I made him quit smoking.
Non lo feci molto rapidamente.
I didn’t do it very quickly.
Ero stanca, quindi non lo feci.
I was tired, so I didn't do it.
Lo feci durante le vacanze estive.
I did it during the summer holidays.
Lo feci, e poi gliene andai a prendere un’altra.
I did it, and then I went and got him/her another one.
— Il mio amico Ivan Lapshin (1985)
I did it without thinking.
I made him angry.
Lo feci perché volevo essere come mio padre.
I did it because I wanted to be like my father.