| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [vb pp] to [be] [adv] | 29 |
|
| 2 | could be [vb pp] to be [adv] | 29 |
|
| 3 | could be [vb pp] to be [adv] | 29 |
|
| 4 | could be [vb pp] to [be] [adv] | 26 |
|
| 5 | could be said to [be] [adv] | 9 |
|
| 6 | could be shown to [be] [adv] | 7 |
|
