| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] must have been to | 6 |
|
| 2 | [pers pn] must have been to | 6 |
|
| 3 | must have been [verb] to | 33 |
|
| 4 | must have been [adj] to | 29 |
|
| 5 | must have been [adj] to | 28 |
|
| 6 | must have been [vb pp] to | 23 |
|
| 7 | must have been [v-ing] to | 10 |
|
| 8 | must have been obvious to | 5 |
|
| 9 | must have been obvious to | 5 |
|
| 10 | must have been [adv] to | 5 |
|
