| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [vb pp] [prep] [art] | 2751 |
|
| 2 | be [vb pp] [prep] [art] [num] | 2269 |
|
| 3 | could be [vb pp] [prep] [num] | 187 |
|
