| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] to be | 91833 |
|
| 2 | [vb past] to be | 18246 |
|
| 3 | happen to be | 1101 |
|
| 4 | happened [prep] be | 441 |
|
| 5 | happened to [be] | 441 |
|
