I would haveI would havecalled him right called him right away.away.

We use “I would We use “I would have” to give an have” to give an opinion about an opinion about an action in the past.action in the past.

You should haveYou should havecleaned it cleaned it immediately.immediately.

We use “you We use “you should have” to to should have” to to make a suggestion make a suggestion

about a past about a past event.event.

What would you have done?What would you have done?

WhWh--

woulwouldd

pronoupronounn

havhavee

past past participleparticiple

I would have sent him a nice birthday present.I would have sent him a nice birthday present.

subjecsubjectt

would would havehave

past past participleparticiple

resrestt

What should I have done?What should I have done?

WhWh--

shoulshouldd

pronoupronounn

havhavee

past past participleparticiple

You should have told them about it.You should have told them about it.

subjecsubjectt

should should havehave

past past participleparticiple

resrestt