| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [ex0] must [verb] [been] some | 6 |
|
| 2 | [ex0] must [verb] [been] some [noun] | 19 |
|
| 3 | [ex0] must [verb] [been] some [noun sg] | 16 |
|
