| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] to [be] [verb] | 35933 |
|
| 2 | [vb past] to [be] [verb] | 8538 |
|
| 3 | happen to [be] [verb] | 216 |
|
| 4 | happened [prep] [be] [verb] | 121 |
|
