| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [verb] [verb] to | 24 |
|
| 2 | could be [verb] [verb] to | 24 |
|
| 3 | could be [vb pp] [verb] to | 23 |
|
| 4 | could be [verb] [to-vb] to | 15 |
|
| 5 | could be [verb] [v-ing] to | 9 |
|
| 6 | could be [verb] accord to | 8 |
|
| 7 | could be [verb] according to | 8 |
|
