| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [adv] happen | 403 |
|
| 2 | it [adv] happens | 195 |
|
| 3 | it [adv] happened | 180 |
|
| 4 | it so happen | 100 |
|
| 5 | it just happen | 66 |
|
| 6 | it never happen | 47 |
|
| 7 | it often happen | 38 |
|
| 8 | it ever happen | 18 |
|
| 9 | it also happen | 16 |
|
| 10 | it really happen | 16 |
|
| 11 | it [adv] happen | 14 |
|
| 12 | it actually happen | 14 |
|
| 13 | it still happen | 13 |
|
| 14 | it sometimes happen | 13 |
|
| 15 | it only happen | 11 |
|
| 16 | it [adv] happening | 10 |
|
| 17 | it always happen | 7 |
|
