| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] not [verb] [prep] [be] | 553 |
|
| 2 | [modal v] not [verb] [prep] [be] | 553 |
|
| 3 | could [adv] [verb] [prep] [be] | 140 |
|
| 4 | could not [verb] [prep] [be] | 86 |
|
| 5 | could not [verb] [prep] [be] | 86 |
|
