| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [be] [vb pp] [adv] | 410 |
|
| 2 | [pron] could [be] [vb pp] to | 167 |
|
| 3 | could [be] [vb pp] [adv] to | 109 |
|
| 4 | [pron] could [be] [adv] to | 20 |
|
