| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] occur at any time | 10 |
|
| 2 | [vb mod] occur at any time | 10 |
|
| 3 | can occur at any time | 6 |
|
| 4 | can occur at any time | 6 |
|
| 5 | occur at any time [prep] | 6 |
|
| 6 | occur at any time [prep] | 6 |
|
