| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it so happen that the | 23 |
|
| 2 | it so [vb past] that the | 18 |
|
| 3 | it so happened that the | 17 |
|
| 4 | it so [vb -s] that the | 6 |
|
| 5 | it so happens that the | 6 |
|
