0 In present time: 01i 00must have02i 02br 02br 00 This library 01u 00must have02u 00 a million books. = It must be the case that this library 01u 00has02u 00 a million books. 02br 02br 00 In past time: 01i 00must have had02i 02br 02br 00 This library 01u 00must have had02u 00 a million books.
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