Just structure gives the sense of that work which you did few minutes before or very very near in past. It is your completed action that you have done.
Just + Verb3rd
We use it for Short Time.
- I have just taken the class.
- He has just gone market.
- They have just come from the office.
Here are some more examples of structure Just.
- I have just watched Movie.
- He has just given a presentation.
- Ali has just woke up.
- Alina has just come from shopping.
- We have just finished dinner.
- They have just announced the results.