| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] be [verb] to | 4351 |
|
| 2 | be [verb] prior to | 62 |
|
| 3 | [prep] be [verb] prior | 13 |
|
| 4 | [prep] [verb] prior to | 9 |
|
