| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [be] [verb] | 134732 |
|
| 2 | could [be] [verb] | 15990 |
|
| 3 | could [verb] [verb] | 7462 |
|
| 4 | could [verb] [be] | 3102 |
|
