| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] have been responsible for | 39 |
|
| 2 | may have be responsible for | 20 |
|
| 3 | could have be responsible for | 6 |
|
| 4 | might have be responsible for | 5 |
|
| 5 | must have be responsible for | 5 |
|
