Should have past participle
When using the words 'should have' you are talking about something
in the past that you 'ought to' or 'might have' done.
Here are some examples:
"I should have gone with you."
"I should have studied more for my test."
"I should have eaten breakfast this morning."
"I should have married her when I had the chance."
Should have been past participle ( Verb – 3 ) = Passive
They should have been sent to hospital after being injured.
He should have been arrested as he stole the car.
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