ought to
Verb
Meaning
(auxiliary) Indicating duty or obligation.
(auxiliary) Indicating advisability or prudence.
(auxiliary) Indicating desirability.
(auxiliary) Indicating likelihood or probability.
Source: en.wiktionary.orgSynonyms
Examples
A liar ought to have a good memory.
The man who has received a benefit ought always to remember it, but he who has granted it ought to forget the fact at once.
Whoever hammers a lump of iron, first decides what he is going to make of it, a scythe, a sword, or an axe. Even so we ought to make up our minds what kind of virtue we want to forge or we labour in vain.
In great action, men show themselves as they ought to be, in small action as they are.
A gentleman ought to travel abroad, but dwell at home.
A liar ought to have a good memory.