Modals are special verbs that express ability, permission, possibility, necessity, or obligation. They help show the speaker's attitude or opinion about an action. Common modals include can, could, may, might, will, would, shall, should, must, and ought to. Unlike regular verbs, modals never change their form and are always followed by the base form of the main verb. Key Rules: First, modals never take 's' in third person singular. You say 'He can swim' not 'He cans swim'. Second, questions are formed by moving the modal before the subject: 'Can you help?' Third, negatives add 'not' after the modal: 'cannot', 'should not'. Fourth, modals are followed by infinitive without 'to' (except ought to).
SSC CGL commonly tests modal selection in sentence correction, cloze tests, and error spotting. Questions often test the difference between similar modals like can/could, may/might, should/must. You'll see sentences with missing modals where you choose the most appropriate one. Error spotting questions frequently test incorrect modal usage or wrong verb forms after modals.
- PAWN Method: P-Permission (may/can), A-Ability (can/could), W-Willingness (will/would), N-Necessity (must/should). This helps you quickly identify which modal fits the context.
Identify the context - This shows necessity/obligation
Apply PAWN method - We need 'N' for Necessity
Among options, 'must' shows strong necessity
Check: 'You must complete this work by tomorrow' - grammatically correct Answer: (b) must Another Key Trick: For past forms, remember can→could, may→might, will→would, shall→should. But 'must' stays the same for past meaning, though 'had to' is preferred for past necessity.
Students often use wrong verb forms after modals. Never write 'can to go' or 'must going'. Always use base form: 'can go', 'must go'.
Another error is using double modals like 'might can' - only one modal per verb phrase. Also, don't confuse 'could' (past ability) with 'could' (polite present possibility). Context determines meaning. Formality Levels matter in exams: 'May I?' is more formal than 'Can I?'. 'Would you?' is more polite than 'Will you?'.
Questions often test appropriate modal choice based on formal/informal situations. Remember that 'shall' is rarely used in American English but appears in British English contexts, especially in first person questions: 'Shall we go?'
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