| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has not been [adj] | 309 |
|
| 2 | has [adv] been possible | 68 |
|
| 3 | have not been possible | 59 |
|
| 4 | [verb] not been possible | 59 |
|
| 5 | has not been possible | 51 |
|
| 6 | has [not/n't] been possible | 51 |
|
| 7 | [vb -s] not been possible | 49 |
|
| 8 | has not [be] possible | 48 |
|
| 9 | has not [been] possible | 48 |
|
| 10 | has not be possible | 48 |
|
