| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it would have [been] [adj] | 616 |
|
| 2 | it would have [been] [adj] | 463 |
|
| 3 | it [modal v] have [been] difficult | 48 |
|
| 4 | [pron] would have [been] difficult | 38 |
|
| 5 | it would have [been] difficult | 37 |
|
| 6 | it would [verb] [been] difficult | 37 |
|
| 7 | it would have [been] difficult | 37 |
|
| 8 | it would [vb infin] [been] difficult | 37 |
|
| 9 | it would have [be] difficult | 37 |
|
