| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb past] been [v-ing] | 128 |
|
| 2 | it had been [v-ing] | 125 |
|
| 3 | it [vb past] been raining | 16 |
|
| 4 | it [vb past] been going | 13 |
|
| 5 | it [vb past] been lying | 6 |
|
