| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] what [adv] happen | 16 |
|
| 2 | [is] what [adv] happen | 16 |
|
| 3 | [is] what [adv] happens | 11 |
|
| 4 | is what [adv] happen | 8 |
|
| 5 | 's what [adv] happen | 8 |
|
| 6 | [is] what [adv] happened | 5 |
|
