| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have been [adj] for | 48 |
|
| 2 | must have been [adj] for | 47 |
|
| 3 | [vb mod] have been responsible for | 39 |
|
| 4 | [modal v] have been responsible for | 39 |
|
| 5 | must have been responsible for | 5 |
|
| 6 | must have been responsible [prep] | 5 |
|
| 7 | must have been responsible for | 5 |
|
| 8 | must have be responsible for | 5 |
|
| 9 | must [vb infin] been responsible for | 5 |
|
| 10 | must have [be] responsible for | 5 |
|
| 11 | must have been responsible for | 5 |
|
| 12 | must have been responsible [prep] | 5 |
|
| 13 | must [verb] been responsible for | 5 |
|
| 14 | must have been responsible for | 5 |
|
| 15 | must have [been] responsible for | 5 |
|
