Should have / shouldn't have / past conditional
Someone stole my wallet from the back pocket of my jeans while I was on the bus.
I went to the horse race last week and now I haven't got any money.
My girl / boyfriend has finished with me.
I got a parking ticket this morning.
I can't keep my eyes open! I didn't get to bed until two o'clock last night.
I couldn't sleep last night. My neighbour kept playing loud music until 3 a.m.
My boss caught me playing computer games this morning and got very angry.
I've got a terrible hang over!
Someone stole my wallet from the back pocket of my jeans while I was on the bus.
I went to the horse race last week and now I haven't got any money.
My girl / boyfriend has finished with me.
I got a parking ticket this morning.
I can't keep my eyes open! I didn't get to bed until two o'clock last night.
I couldn't sleep last night. My neighbour kept playing loud music until 3 a.m.
My boss caught me playing computer games this morning and got very angry.
I've got a terrible hang over!
Possible responses

I've got a terrible hang over!

You shouldn't have drunk so much.

If you'd hadn't drunk so much, you wouldn't have a hang over.

Someone stole my wallet from the back pocket of my jeans while I was on the bus.

You should have taken more care of it.

If you'd taken more care of it, you wouldn't have lost it.

I went to the horse race last week and now I haven't got any money.

You shouldn't have gambled all your money.

If you hadn't gambled all your money, you'd have some now!

My girl / boyfriend has finished with me.

You should have spent more time with him / her

If you'd spent more time with her, she wouldn't have finished with you.

I got a parking ticket this morning.

You should have parked int the car park.

If you'd parked in the car park, you wouldn't have got a ticket.

I can't keep my eyes open! I didn't get to bed until two o'clock last night.

You should have gone to bed earlier.

If you'd gone to bed earlier, you wouldn't be so tired.

I couldn't sleep last night. My neighbour kept playing loud music until 3 a.m.

You should have knocked on his door and asked him to turn it down.

If you'd asked him, he would probably have turned it down.

My boss caught me playing computer games this morning and got very angry.

You should have kept an eye open for him.

If you'd been watching, you'd have had time to close the game before he saw you.