| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [verb] [prep] | 7290 |
|
| 2 | could be [verb] [prep] | 7290 |
|
| 3 | [modal v] be [verb] on | 4757 |
|
| 4 | could be [verb] on | 329 |
|
| 5 | could [be] [verb] on | 329 |
|
