| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] have [been] [v-ing] [prep] | 41 |
|
| 2 | have [been] [v-ing] place [prep] | 19 |
|
| 3 | [conj] have [been] [v-ing] place | 8 |
|
