| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] to be a | 8485 |
|
| 2 | [vb past] to be a | 1553 |
|
| 3 | happen to be a | 144 |
|
| 4 | happened to be [art] | 70 |
|
| 5 | happened to [be] a | 39 |
|
| 6 | happened [prep] be a | 39 |
|
