Modal Error Correction: Should/Should have
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Correction Help
When you want to express a personal opinion or give direct advice, use should + infinitive. For example: You should vote for Party X in the election. To express the same opinion about the past, use should + have + past participle. For example: I'm not happy with the election results. I should have voted for Party X.
Compare:
You should brush your teeth or else they will fall out in the future.
You should have brushed. All your teeth have fallen out.