I visit my friends - Present Simple
I visiting my friends - Present Continuous
I have been visiting my friends - Present Perfect Continuous
I have visited my friends - Present Perfect
I visited my friends - Past Simple
I was visiting my friends - Past Continuous
I had been visiting my friends - Past Perfect Continuous
I had visited my friends - Past Perfect
I will visit my friends - Future Simple
I will be visiting my friends - Future Continuous
I will have been visiting my friends- Future Perfect Continuous
I will have visited my friends - Future Perfect
2. Tomorrow my friend will be go in Paris. Next weak he (or she) will be go in Rome. He (or she) will be go in Madrid at 5 o'clock tomorrow afternoon. He will probably be go in Berlin in two days. He (or she) will be go in Amsterdam in three days. He (or she) will be go back at home in ten days.
3. How are you ? I am all right, thanks. Did you at the lecture yesterday ? Yes, I did. Where are the students ? They are in the room. They are not (aren't) expensive. They was happy to see their old friend. I think I will go in Moscow soon. My mother will go at home next Friday.