We OUGHT TO review the vocabulary tonight.
Ought to and should both express advice.
Modals and future
Match form and strength
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First identify the meaning: advice, obligation, possibility, or future result.
Your attendance is COMPULSORY.
Compulsory means required; must expresses that obligation.
The plane may have been shot down.
May have been marks a past possibility, not certainty.
If she passes the ECL, she _____ begin training.
Present in the if-clause; will + base verb in the result.
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Grammar references: Class 3 slides 34–45 · Class 5 slides 18–21 and 25–26.