| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have [been] running | 12 |
|
| 2 | it [verb] been running | 12 |
|
| 3 | it [vb -s] [been] running | 8 |
|
| 4 | it 's [been] running | 5 |
|
