| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] be [verb] [verb] | 395 |
|
| 2 | [Wh pn] could [adv] be [verb] | 80 |
|
| 3 | [Wh pn] could [adv] [verb] [verb] | 62 |
|
| 4 | [Wh pn] could be [verb] [verb] | 27 |
|
