| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it had been [adj] [prep] | 123 |
|
| 2 | it [verb] been possible [prep] | 17 |
|
| 3 | it have been possible [prep] | 17 |
|
| 4 | [pron] had been possible [prep] | 6 |
|
| 5 | it had be possible [prep] | 5 |
|
| 6 | it [vb past] been possible [prep] | 5 |
|
| 7 | it had [been] possible [prep] | 5 |
|
| 8 | it had [be] possible [prep] | 5 |
|
