| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] must [prep] been | 99 |
|
| 2 | i [modal v] [prep] been | 26 |
|
| 3 | i must [prep] be | 5 |
|
| 4 | i must [prep] [be] | 5 |
|
| 5 | i must [prep] [been] | 5 |
|
| 6 | i must [prep] been | 5 |
|
