| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [be] [verb] [conj] | 300 |
|
| 2 | [adv] [be] [verb] [conj] a | 58 |
|
| 3 | could [adv] [be] [verb] a | 42 |
|
| 4 | could [be] [verb] [conj] a | 41 |
|
| 5 | could [adv] [verb] [conj] a | 6 |
|
