| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | happened [prep] be | 441 |
|
| 2 | happened to [be] | 441 |
|
| 3 | happened [prep] [be] | 441 |
|
| 4 | happened [prep] [be] | 441 |
|
| 5 | happened [prep] be | 441 |
|
| 6 | happened to [be] | 441 |
|
