| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] would have been difficult | 11 |
|
| 2 | [noun] would have be difficult | 11 |
|
| 3 | [noun] would have [been] difficult | 11 |
|
| 4 | [noun sg] would have [be] difficult | 8 |
|
