1. Your friend has an overweight problem (use shouldn't) 2. Your friend cannot stop his gaming habit (use should) 3. Your friend was late coming to school (use should have + V3)
JusTJdo
1. You shouldn't eat too much 2. You should know the impact of playing too much video game 3. You should have went to school earlier
2. You should know the impact of playing too much video game
3. You should have went to school earlier