Topics: Dating - Wikipedia
Should is most commonly used to make recommendations or give advice. It can also be used to express obligation as well as expectation.
Most modal verbs behave quite irregularly in the past and the future. Study the chart below to learn how should behaves in different contexts.
"Should" can also express something between recommendation and obligation. "Be supposed to" expresses a similar idea and can easily be used in the past or in negative forms.