| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which have [adv] been [v-ing] [prep] | 5 |
|
| 2 | which [verb] [adv] been [v-ing] [prep] | 5 |
|
| 3 | which [verb] [adv] been [v-ing] [prep] | 5 |
|
