| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [prep] an | 4217 |
|
| 2 | but [vb past] [prep] | 1629 |
|
| 3 | but [prep] an | 475 |
|
| 4 | but [vb past] an | 63 |
|
