| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] have [be] | 471 |
|
| 2 | could [adv] [be] a | 227 |
|
| 3 | [adv] have [be] a | 222 |
|
| 4 | could have [be] a | 219 |
|
| 5 | could [adv] have a | 45 |
|
