| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [be] [verb] [conj] a | 406 |
|
| 2 | could [be] [verb] [conj] [art] | 266 |
|
| 3 | could [be] [verb] [conj] [art] | 266 |
|
| 4 | could [be] [verb] [conj] a | 48 |
|
| 5 | could [be] [verb] [conj] a | 41 |
|
