• For offers and suggestions in the question form, with / and we, we use shall not will.
✓ Shall I help you with the advertising campaign? (offer)
✓ Shall we discuss this in the morning? (suggestion)
• For requests, we can also use would, could or can. Would and could are more polite than will and can.
✓ Would/Could/Can you give a presentation on the sales figures?
• For refusals, we can also use couldn't or can't. Couldn't is more polite than won't and can't.
✓ No, I couldn't/can't give a presentation on the sales figures
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