| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | would have [be] impossible | 81 |
|
| 2 | would have [been] impossible | 81 |
|
| 3 | would have been impossible | 81 |
|
| 4 | would have [be] impossible | 81 |
|
| 5 | would have be impossible | 81 |
|
