Hello, Babuni—and welcome to English Forums. Should be, should have — These present forms are used just as with other verbs: should go, should eat, should study , etc. htm Should have been — This is used just as with other verbs: should have gone, should have eaten, should have had , etc.
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Anonymousf I had gone there would have been good. (there instead of it).No, you need 'it', Anon.