| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have been [v-ing] all | 10 |
|
| 2 | it 's been [v-ing] [det] | 10 |
|
| 3 | it had been [v-ing] [det] | 5 |
|
| 4 | it have been [v-ing] that | 5 |
|
| 5 | it have been raining [det] | 5 |
|
