| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | only if [verb] [prep] | 27 |
|
| 2 | only if [vb pp] [prep] | 27 |
|
| 3 | only if [verb] by | 12 |
|
| 4 | only if [verb] by | 12 |
|
