| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [verb] [prep] a | 15653 |
|
| 2 | could [be] [verb] [prep] | 7289 |
|
| 3 | could [verb] [prep] a | 1099 |
|
| 4 | could [be] [verb] a | 134 |
|
| 5 | could [be] [prep] a | 61 |
|
