| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] [prep] a | 18683 |
|
| 2 | could be [verb] [prep] | 7289 |
|
| 3 | could [verb] [prep] a | 1246 |
|
| 4 | could be [verb] a | 155 |
|
| 5 | could be [prep] a | 65 |
|
