Here are the answers to your questions: 1. No, if you only have one possibility, you should use "will" or "won't" to show certainty rather than "be likely to". "Be likely to" implies there are other possible outcomes. 2. To show how certain you are about something, you would use "will" or "won't". 3. False. You can use "must" or "can't" to make logical deductions, not just "must". 4. Three tips for success in a competitive market: - Have a clear unique value proposition or point of differentiation from competitors - Provide excellent customer service and support - Constantly innovate and improve