| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [verb] been [adj] for | 48 |
|
| 2 | [vb mod] [verb] been responsible for | 39 |
|
| 3 | [modal v] [verb] been responsible for | 39 |
|
| 4 | must [verb] been responsible for | 5 |
|
| 5 | must [verb] been responsible [prep] | 5 |
|
| 6 | must [verb] be responsible for | 5 |
|
| 7 | must [verb] been responsible for | 5 |
|
| 8 | must [verb] [been] responsible for | 5 |
|
| 9 | must [verb] been responsible [prep] | 5 |
|
| 10 | must [verb] [be] responsible for | 5 |
|
