Sentence examples for i must have from inspiring English sources

The phrase "I must have" is grammatically correct and commonly used in written English.
You can use this phrase when expressing a strong desire or necessity for something. It can also be used to express certainty about something that has happened or will happen. Example 1: "I must have a cup of coffee every morning to start my day." Example 2: "I must have left my keys in the car, because I can't find them anywhere." Example 3: "I must have that new book by my favorite author as soon as it comes out."