| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [adj] | 4588 |
|
| 2 | must be [adj] | 3713 |
|
| 3 | [modal v] be responsible | 476 |
|
| 4 | must be responsible | 12 |
|
| 5 | must be responsible | 12 |
|
| 6 | must [be] responsible | 12 |
|
| 7 | must [be] responsible | 12 |
|
