Compared to the complexity of the English verbal system, the Russian one is quite simple.
PAST | I worked I did work I was working I had worked I had been working | Я работал |
PRESENT | I work I do work I am working I have worked I habe been working | Я работаю |
FUTURE | I will work I will be working I will have worked I will have been working I am going to work I am going to be working | Я буду работать |