to set off
- set in motion or cause to begin
- Set off right now.
- They set off fireworks.
- He set off for London.
- Tom set off some fireworks.
- He set off to Paris.
- She's about to set off.
- Mary has already set off.
- We're going to set off at four.
- He told us, "Set off at once."
- You'd better set off at once.
- My friends set off to America.
- You must set off at once.
- He has set off for America.
- We should have set off earlier.
- He has set off for Kyushu.