| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [verb] happened to [art] | 110 |
|
| 2 | [Wh det] have happened to [art] | 110 |
|
| 3 | [Wh det] has happened [prep] [art] | 80 |
|
| 4 | [Wh det] has happened [prep] [art] | 80 |
|
| 5 | [Wh det] has [verb] to [art] | 78 |
|
| 6 | [Wh det] has [vb pp] to [art] | 78 |
|
| 7 | [Wh det] [vb -s] happened to [art] | 60 |
|
| 8 | [pron] has happened to [art] | 33 |
|
| 9 | [Wh det] has happened to [art] | 30 |
|
| 10 | [Wh det] has happened to [art] | 30 |
|
| 11 | [Wh det] has happen to [art] | 30 |
|
