| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [adj] to | 272 |
|
| 2 | must be [adj] to | 265 |
|
| 3 | [modal v] be open to | 184 |
|
| 4 | [vb mod] be open to | 184 |
|
| 5 | must be open [prep] | 19 |
|
| 6 | must be open [prep] | 19 |
|
| 7 | must be open to | 13 |
|
| 8 | must be open to | 13 |
|
| 9 | must [be] open to | 13 |
|
| 10 | must be open to | 13 |
|
