| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should be [vb pp] prior | 9 |
|
| 2 | must be [vb pp] prior | 9 |
|
| 3 | will be [vb pp] prior | 7 |
|
| 4 | can be [vb pp] prior | 6 |
|
