| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [vb mod] [verb] to | 1162 |
|
| 2 | [Wh det] [vb mod] [vb infin] to | 1157 |
|
| 3 | [Wh det] [vb mod] happen [prep] | 454 |
|
| 4 | [Wh det] [vb mod] happen [prep] | 454 |
|
| 5 | [pron] [vb mod] happen to | 375 |
|
| 6 | [Wh det] [modal v] happen to | 293 |
|
| 7 | [Wh det] [vb mod] happen to | 293 |
|
| 8 | [Wh det] [vb mod] happen to | 293 |
|
