| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] must have been at | 24 |
|
| 2 | [noun] must have been at | 12 |
|
| 3 | [pers pn] must have been at | 12 |
|
| 4 | [noun sg] must have been at | 9 |
|
| 5 | there must have been at | 8 |
|
| 6 | there must have been at | 8 |
|
| 7 | [ex0] must have been at | 8 |
|
| 8 | it must have been at | 5 |
|
| 9 | it must have been at | 5 |
|
| 10 | must have been [verb] at | 14 |
|
| 11 | must have been [vb pp] at | 9 |
|
| 12 | must have been [adj] at | 7 |
|
| 13 | must have been [adj] at | 7 |
|
| 14 | must have been [v-ing] at | 5 |
|
| 15 | must have been at least | 23 |
|
| 16 | must have been at [adv] | 23 |
|
| 17 | must have been at least | 23 |
|
| 18 | must have been at [adv] | 23 |
|
| 19 | must have been at [adj] | 6 |
|
| 20 | must have been at [art] | 6 |
|
| 21 | must have been at [art] | 6 |
|
| 22 | must have been at [det] | 5 |
|
