| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [modal v] [be] [verb] [prep] a | 525 |
|
| 2 | [conj] could [be] [verb] [prep] [art] | 208 |
|
| 3 | [conj] could [be] [verb] [prep] [art] | 208 |
|
| 4 | [conj] could [be] [verb] [prep] a | 93 |
|
