| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [adv] happen | 43 |
|
| 2 | which [adv] happen | 43 |
|
| 3 | which [adv] happens | 22 |
|
| 4 | which [adv] happened | 18 |
|
| 5 | which just happen | 16 |
|
| 6 | which just happen | 16 |
|
| 7 | which also happen | 9 |
|
| 8 | which also happen | 9 |
|
