| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have been the [adj] | 62 |
|
| 2 | must have [been] the [adj] | 61 |
|
| 3 | must have [been] the [adj] | 25 |
|
| 4 | must have [been] the [num ord] | 16 |
|
| 5 | must have [been] the [adj -est] | 14 |
|
| 6 | must have [been] the last | 9 |
|
| 7 | must have [been] the last | 9 |
|
