| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh adv] it [verb] | 3527 |
|
| 2 | [Wh adv] it [vb past] | 1552 |
|
| 3 | [adv] it happened | 138 |
|
| 4 | [Wh adv] [pron] happened | 129 |
|
| 5 | [Wh adv] it happen | 128 |
|
