Playing video games is my favorite pastime.

[tufguy]

1) Playing video games is my favorite pastime.
2) I play video games to pass the time.
3) What do you do to pass the time?
4) What was your favorite pastime as a kid?

Do we say "we do something to 'pass' the time or 'past' the time?

 

[5jj]

Do we say "we do something to 'pass' the time or 'past' the time?

The former.

Your four sentences are correct.

 

[Margarinesden]

Not a teacher

The correct expression is "to pass the time." So, in sentences 2 and 3, it would be "I play video games to pass the time" and "What do you do to pass the time?" The phrase implies engaging in activities to make time go by more quickly or pleasantly.