| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] not be explain | 99 |
|
| 2 | [modal v] not be explained | 99 |
|
| 3 | can not be explain | 82 |
|
| 4 | can not be explain | 82 |
|
| 5 | could not be explain | 15 |
|
| 6 | could not be explain | 15 |
|
