| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [be] [vb pp] for | 643 |
|
| 2 | [be] [vb pp] for a | 575 |
|
| 3 | could [be] [vb pp] a | 90 |
|
| 4 | could [be] for a | 5 |
|
