| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have been [verb] [prep] | 320 |
|
| 2 | [modal v] have been wait [prep] | 12 |
|
| 3 | [vb mod] have been wait [prep] | 12 |
|
| 4 | must have be wait [prep] | 6 |
|
| 5 | must have been wait [prep] | 6 |
|
| 6 | must [verb] been wait [prep] | 6 |
|
| 7 | must have [be] wait [prep] | 6 |
|
| 8 | must have [been] wait [prep] | 6 |
|
