| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [modal v] have been [prep] | 227 |
|
| 2 | [noun] must have been [prep] | 77 |
|
| 3 | [noun sg] must have be [prep] | 46 |
|
| 4 | [noun sg] must have [be] [prep] | 46 |
|
| 5 | [noun sg] must [verb] been [prep] | 46 |
|
| 6 | [noun sg] must have [been] [prep] | 46 |
|
| 7 | [noun sg] must have been [prep] | 46 |
|
