Как отличить паст перфект от паст симпл?

Паст перфект это прошлое а  паст симпл это настояшее

Part 1 1. i use the net for 3 hours every day. 2. i use the internet for searching useful information for my school, playing computer games and communicating with my friends. 3. in our it lessons we learn about computers and computerized programs. 4. they develop our speed of thinking. moreover, if you know how to use the computer, you will simply and easily find any information you need. 5. to those people who spend a lot of time surfing the net i would recommend to wear glasses  and to do some pauses while using. part 2 1. i would prefer  to have a lot of free time to spend it on my hobbies. 2. we would spend our free time playing football, going to the cinemas and visiting new places where we have never been to before. 3. i would spend my free time with my family because my parents are really busy and we rarely spend it on each other. 4. if i have more free time, i would playing in football team because i like sport games.