| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [prep] [be] | 96064 |
|
| 2 | [vb past] [prep] [be] | 18905 |
|
| 3 | happen [prep] [be] | 1101 |
|
| 4 | happened [prep] [be] | 441 |
|
