| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] must have been in | 51 |
|
| 2 | he [modal v] have been in | 47 |
|
| 3 | he must have been [prep] | 25 |
|
| 4 | he must have been [prep] | 25 |
|
| 5 | he must have [been] in | 10 |
|
| 6 | he must have [be] in | 10 |
|
| 7 | he must have be in | 10 |
|
| 8 | he must [verb] been in | 10 |
|
| 9 | he must have been in | 10 |
|
