| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [vb pp] | 15275 |
|
| 2 | [pron] could be | 9090 |
|
| 3 | [pron] be [vb pp] | 1340 |
|
| 4 | [pron] could [vb pp] | 13 |
|
