English

SIMPLE PAST
af: I worked hard yesterday - pronome + verb + ed
neg: I did not work hard yesterdey - pron. + did + not + verd
Int: Did I work hard yesterday? - did + pron + verd

PAST CONTINUOUS
af: I was working yesterday - pron +was/were + verb+ing
neg: I wasn´t working yesterday - pron + was/were +not+verb+ing
int. Was I  working yesterday? - was/were+pron+verb+ing

PRESENT PERFECT
af: I have worked since 2010 - pron+HAVE+v.participio
neg: I haven't worked since 2010- pron+HAVE+not+v.participio
int: Have I worked  since 2010? - HAVE+pron+v.participio

PAST PERFECT
af: I had worked since 2010 - pron+HAD+v.participio
neg: I hadn't worked since 2010- pron+HAD+not+v.participio
int: Had I worked since 2010?  - HAD+pron+v.participio