Beki desu べきです

Predicative phrase meaning: should, ought to (do)
1. After dictionary form of verb
一生けんめい働くべきです。
Isshoukenmei hataraku beki desu.
You should work hard.
そんなものを買うべきではない。
Sonna mono o kau beki dewa nai.
You shouldn’t buy such a thing.
もっと早く来るべきでした。
Motto hayaku kuru beki deshita.
I should have come much earlier.
あなたはもっと勉強す()べきです。
Anata wa motto benkyou su(ru) beki desu.
You should study more.
(suru + beki may be abbreviated to subeki)

2. Used as adjective
それは注目すべき点でした。
Sore wa chuumoku subeki ten deshita.
That’s the point you should pay attention to.
(dictionary form of verb + beki directly precedes the noun and da or desu follows)

-> See also nakereba naranai