| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [verb] to [be] | 803 |
|
| 2 | who [vb past] to [be] | 367 |
|
| 3 | [pron] happened to [be] | 236 |
|
| 4 | who happen to [be] | 111 |
|
| 5 | [Wh pn] happened to [be] | 59 |
|
| 6 | who happened [prep] [be] | 56 |
|
| 7 | who happened to [be] | 56 |
|
