| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have been [v-ing] in | 16 |
|
| 2 | it have been [v-ing] in | 16 |
|
| 3 | it has been [v-ing] in | 7 |
|
| 4 | it had been [v-ing] in | 5 |
|
