| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | before they can be [vb pp] [prep] | 14 |
|
| 2 | before they can be [verb] [prep] | 14 |
|
| 3 | before they can be [verb] [prep] | 14 |
|
| 4 | before they can be [verb] [prep] | 14 |
|
