| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [adj] to | 265 |
|
| 2 | must be due to | 20 |
|
| 3 | must be equal to | 13 |
|
| 4 | must be open to | 13 |
|
| 5 | must be sensitive to | 12 |
|
| 6 | must be subject to | 11 |
|
| 7 | must be able to | 11 |
|
| 8 | must be acceptable to | 9 |
|
| 9 | must be available to | 9 |
|
| 10 | must be grateful to | 8 |
|
| 11 | must be alert to | 6 |
|
| 12 | must be central to | 5 |
|
| 13 | must be accountable to | 5 |
|
| 14 | must be used to | 5 |
|
| 15 | must be subordinate to | 5 |
|
