| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [vb mod] have occur | 21 |
|
| 2 | [Wh det] [vb mod] [vb infin] occur | 21 |
|
| 3 | [Wh det] [vb mod] have occur | 21 |
|
| 4 | [Wh det] [vb mod] [verb] occurred | 20 |
|
| 5 | which [vb mod] [verb] occur | 17 |
|
| 6 | [Wh det] may [verb] occur | 9 |
|
| 7 | [Wh det] would [verb] occur | 5 |
|
