| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [pron] [adv] happen | 18 |
|
| 2 | [is] [Wh det] [adv] happen | 16 |
|
| 3 | [is] what [adv] happen | 16 |
|
| 4 | [is] what [adv] happen | 16 |
|
| 5 | [is] [pron] [adv] happens | 11 |
|
| 6 | is [pron] [adv] happen | 10 |
|
| 7 | 's [pron] [adv] happen | 8 |
|
| 8 | [is] [pron] [adv] happened | 5 |
|
