| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have been one [prep] [det] | 5 |
|
| 2 | must have [be] one of [det] | 5 |
|
| 3 | must have [be] one [prep] [det] | 5 |
|
| 4 | must have [been] one [prep] [det] | 5 |
|
| 5 | must have be one [prep] [det] | 5 |
|
