| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] it have [adv] happen | 5 |
|
| 2 | [v-ing] [pron] have [adv] happened | 5 |
|
| 3 | [v-ing] [pers pn] have [adv] happen | 5 |
|
| 4 | [v-ing] it have [adv] happen | 5 |
|
