| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [modal v] not have [be] | 56 |
|
| 2 | [adv] could [adv] have [be] | 20 |
|
| 3 | [adv] could not [verb] [be] | 19 |
|
| 4 | [adv] could not [vb infin] [be] | 19 |
|
| 5 | [adv] could not have [be] | 15 |
|
