How do you feel when I say "I must send by tomorrow"? Hi, there. I have a question about meaning of "must" For example Customer: When are you dispatching the item? Online shop: I must send it by tomorrow. In this case, how do you feel the meaning about "I must send"? Do you feel like "I have to send it by tomorrow" or "I probably will send it by tomorrow"? If I want to use "must" as "probably", is it right usage? Thanks in advance!