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