| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may have been responsible | 24 |
|
| 2 | may have [be] responsible | 24 |
|
| 3 | may have be responsible | 24 |
|
| 4 | may have [be] responsible | 24 |
|
| 5 | may have [been] responsible | 24 |
|
