Conditional Links is a very simple activity with no preparation needed; it’s ideal to practice conditionals and can be used as a quick filler to do just that.
Simply write up on the board the first clause of any conditional, e.g.
If I won the lottery…
Choose a student at random and ask them to finish the sentence:
If I won the lottery… I would buy a Porsche.
Now ask another student to complete a new sentence beginning with previous clause:
I would buy a Porsche… if I could drive.
And another student creates a sentence with the previous clause:
If I could drive… I would visit my girlfriend.
And so on and so on ad infinitum!
Useful Links
Choosing a Student at Random – how to choose random students in class
Conditionals in English Grammar – all about conditionals