| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [vb pp] [prep] | 7113 |
|
| 2 | [det] be [vb pp] [prep] | 245 |
|
| 3 | could [det] be [vb pp] | 62 |
|
| 4 | could [det] be [prep] | 8 |
|
