1 Last week I worked
2 Last week I was working
As far as I'm concerned 1 is more common and second would be more natural when we add for instance " Last week I was working when I decided to take a break" Is that right?
3 I will work next week
4 I will be working next week
Is the situation the same with future simple and continuous? I'm asking because even in Oxford dictionary I found this example " they will be flying to Germany next week" .Woudn't it be more natural to use future simple since it's only one action nothing interrupts it or happens simultaneously?