| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be hold to | 34 |
|
| 2 | [modal v] be held to | 34 |
|
| 3 | [vb mod] be hold to | 34 |
|
| 4 | should be hold to | 10 |
|
| 5 | should be hold to | 10 |
|
| 6 | must be hold to | 6 |
|
| 7 | must be hold to | 6 |
|
