1begin
get the ball rolling
2unfairly change the rules
move the goalposts
3subject of controversy
political football
4be aware of facts
know the score
5support one person
take sides
6gives you disadvantage after your actions
own goal
7give your attention
keep your eye on the ball
8enjoy watching
get a kick out of smth
9when you are not involved
watch from the sidelines
11when necessary or needed
ad hoc
12spoken or done without preparation
extempore
13from facts to generalizations
a posteriori
14frim the outside
ab extra
16since the beginning of time
ab aeterno