Is ''should know'' correct? vs Should Have Known
most of the times I see ''you should've known'' but I wonder if ''should know'' it's correct (in the present tense)

e.g. You should know that this kind of attitudes are unnecessary

should have known - past
should know - present

is it right?

Question

Is ''should know'' correct? vs Should Have Known
most of the times I see ''you should've known'' but I wonder if ''should know'' it's correct (in the present tense)

e.g. You should know that this kind of attitudes are unnecessary

should have known - past
should know - present

is it right?

Answer

"Why were you so rude to him?  You should have known the right thing to say. I am angry with you now."

"If you want to avoid being rude, you should know the right thing to say."

Can you see the difference in usage?

Verpassen Sie nicht die Gelegenheit, bequem von zu Hause aus eine Sprache zu lernen. Stöbern Sie in unserer Auswahl an erfahrenen Sprachlehrern und melden Sie sich jetzt zu Ihrer ersten Unterrichtsstunde an!