| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] must [vb infin] been some [noun sg] | 26 |
|
| 2 | [pron] must have been some [noun sg] | 26 |
|
| 3 | [pron] must have been some [noun sg] | 26 |
|
| 4 | there must [verb] been some [noun sg] | 16 |
|
| 5 | [ex0] must [verb] been some [noun sg] | 16 |
|
| 6 | there must [verb] been some [noun sg] | 16 |
|
| 7 | it must [verb] been some [noun sg] | 10 |
|
| 8 | [pers pn] must [verb] been some [noun sg] | 10 |
|
| 9 | it must [verb] been some [noun sg] | 10 |
|
