| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it has [been] possible for | 9 |
|
| 2 | [pron] has [been] possible for | 9 |
|
| 3 | [pers pn] has [been] possible for | 9 |
|
| 4 | it has [been] possible for | 9 |
|
| 5 | has [been] possible for [adj] | 5 |
|
