| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [prep] [be] | 14661 |
|
| 2 | could [adv] [be] | 7505 |
|
| 3 | could [adv] [prep] | 227 |
|
| 4 | could [prep] [be] | 66 |
|
