Present Simple
Bildung: I go / he goes / I don't go / does she go?
Signalwörter: always, usually, normally, regularly, often, frequently, sometimes, rarely, seldom, never, once a month, every day, in the evening, at 11 o'clock, at night, on Saturdays, how often?
Present Continuous
Bildung: I am going / you are not going / is he going?
Signalwörter: now, right now, at the moment, this week, this month, this year, currently, today, tomorrow, next week, on Sunday
Past Simple
Bildung: I had / I did not have / did you work?
Signalwörter: yesterday, last week, two days ago, in 2004, in the 1950s, in the 19th century, when, then
Verwendung: Abfolge mehrerer aufeinanderfolgender Handlungen in der Vergangenheit.
Past Continuous
Bildung: I was working / you...