| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | that have been [v-ing] place | 8 |
|
| 2 | that [vb base] been [v-ing] place | 8 |
|
| 3 | that [vb base] been taking place | 8 |
|
| 4 | that [vb base] been [v-ing] place | 8 |
|
