| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] not have [verb] | 5317 |
|
| 2 | [modal v] [adv] have occur | 96 |
|
| 3 | [modal v] not [verb] occur | 40 |
|
| 4 | [modal v] not [vb infin] occur | 40 |
|
| 5 | [modal v] not have occur | 39 |
|
