| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | would [verb] been impossible | 81 |
|
| 2 | would have [be] impossible | 81 |
|
| 3 | would [verb] be impossible | 81 |
|
| 4 | would have [be] impossible | 81 |
|
| 5 | would [verb] [be] impossible | 81 |
|
| 6 | would [vb infin] [be] impossible | 81 |
|
| 7 | would [verb] [been] impossible | 81 |
|
