| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [be] [verb] [prep] a | 971 |
|
| 2 | could [be] [verb] [prep] a | 971 |
|
| 3 | [vb mod] [be] [verb] at a | 316 |
|
| 4 | [modal v] [be] [verb] at a | 316 |
|
| 5 | could [be] [verb] at [art] | 85 |
|
| 6 | could [be] [verb] at [art] | 85 |
|
| 7 | could [be] [verb] at a | 33 |
|
| 8 | could [be] [verb] at a | 30 |
|
| 9 | could [be] [verb] at a | 30 |
|
