| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it could be [vb pp] [prep] | 391 |
|
| 2 | but it could be [vb pp] | 31 |
|
| 3 | but could be [vb pp] [prep] | 19 |
|
| 4 | but it could be [prep] | 5 |
|
