| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [vb pp] to be | 148 |
|
| 2 | could be said to be | 66 |
|
| 3 | could be shown to be | 15 |
|
| 4 | could be expected to be | 14 |
|
| 5 | could be considered to be | 12 |
|
| 6 | could be seen to be | 11 |
|
