SHOULD + perfect infinitive
You should have been on time. (but you were not)
We ought to have protected the environment. (but we did not)
These can also be considered as criticism or advice.
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- BE TO + infinitive
- NEEDED TO and NEED + perfect infinitive
- Modals expressing "past advice"
- Modals expressing past unlikelihood
- Modals expressing past "prediction" / expectation / assumption
- BE DUE TO + infinitive
- HAD TO
- Modals expressing past necessity / obligation
- SHOULD and OUGHT TO
- Modals expressing past criticism
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