| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [vb pp] [prep] | 7113 |
|
| 2 | this could be [vb pp] | 315 |
|
| 3 | this be [vb pp] [prep] | 37 |
|
| 4 | this could be [prep] | 21 |
|
