| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [be] responsible for | 275 |
|
| 2 | must [verb] [be] for | 14 |
|
| 3 | must [be] responsible for | 11 |
|
| 4 | must [verb] [be] responsible | 8 |
|
