| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] must have been some | 37 |
|
| 2 | there must have been some | 24 |
|
| 3 | [ex0] must have been some | 24 |
|
| 4 | there must have been some | 24 |
|
| 5 | it must have been some | 12 |
|
| 6 | it must have been some | 12 |
|
| 7 | [pers pn] must have been some | 12 |
|
| 8 | must have been [prep] some | 6 |
|
| 9 | must have been [prep] some | 6 |
|
| 10 | must have been some [noun] | 34 |
|
| 11 | must have been some [noun sg] | 29 |
|
| 12 | must have been some sort | 6 |
|
| 13 | must have been some sort | 6 |
|
