| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [Wh det] [vb mod] happen | 365 |
|
| 2 | [to-vb] [Wh det] [vb mod] [verb] | 174 |
|
| 3 | [to-vb] [Wh det] [vb mod] [vb infin] | 172 |
|
| 4 | [to-vb] [pron] [vb mod] happen | 91 |
|
| 5 | [to-vb] [Wh det] [modal v] happen | 88 |
|
| 6 | [to-vb] [Wh det] [vb mod] happen | 88 |
|
