| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] [vb mod] have been hard | 21 |
|
| 2 | [pers pn] [modal v] have been hard | 20 |
|
| 3 | it [modal v] have been hard | 17 |
|
| 4 | [pers pn] would have been hard | 13 |
|
| 5 | [pers pn] would have been hard | 13 |
|
| 6 | [pers pn] must have been hard | 7 |
|
| 7 | [pers pn] must have been hard | 7 |
|
