| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [adv] [be] [verb] [art] | 547 |
|
| 2 | could [adv] [be] [verb] [art] | 82 |
|
| 3 | could [adv] [be] [verb] [art] | 60 |
|
