| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] some [noun sg] | 144 |
|
| 2 | [vb infin] been some [noun sg] | 70 |
|
| 3 | must [vb infin] been [noun sg] | 47 |
|
| 4 | must [vb infin] been some | 43 |
|
