| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] to [be] | 91837 |
|
| 2 | [vb past] to [be] | 18246 |
|
| 3 | happen to [be] | 1101 |
|
| 4 | happened [prep] [be] | 441 |
|
