We often write articles. (Present Simple Active) Articles are often written. (Present Simple Passive)
We wrote two articles yesterday. (Past Simple Active) Two articles were written yesterday. (Past Simple Passive)
We will write two articles tomorrow. (Future Simple Active.) Two articles will be written tomorrow. (Future Simple Passive)
CONTINUOUS ACTIVEWe are writing articles now.(Present)
We were writing articles the whole last month (Past).
We will be writing articles the following next month. (Future)
We have just written two articles. (Present)
We had written two articles by the end of the month. (Past)
Viktor, you may choose any verbs. ( to write letters, to paint pictures).