The time will come when you will regret it. - The time will come when you will regret this.
The time will come when you will regret it.
The time will come when you will regret this.
Stars emanate gamma rays when they explode. - Stars emit gamma rays at the time of their explosion.
Stars emanate gamma rays when they explode.
Stars emit gamma rays at the time of their explosion.
... they will show up at the right place at the right time ...
... at the right time even before you ask for them. ...