| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have been [prep] [adj] [noun sg] | 100 |
|
| 2 | must have been [prep] [adj] [noun] | 28 |
|
| 3 | must have be [prep] [adj] [noun sg] | 22 |
|
| 4 | must have [been] [prep] [adj] [noun sg] | 22 |
|
| 5 | must have [be] [prep] [adj] [noun sg] | 22 |
|
| 6 | must have been [prep] [adj] [noun sg] | 22 |
|
| 7 | must [verb] been [prep] [adj] [noun sg] | 22 |
|
