| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] not be reduced | 60 |
|
| 2 | [vb mod] not [be] reduced | 60 |
|
| 3 | [modal v] not [be] reduced | 60 |
|
| 4 | [modal v] not be reduced | 60 |
|
| 5 | [modal v] not [be] reduced | 58 |
|
| 6 | can not [be] reduced | 43 |
|
| 7 | can not [be] reduced | 41 |
|
| 8 | could not [be] reduced | 5 |
|
| 9 | could not [be] reduced | 5 |
|
