| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] have been a difficult [noun sg] | 14 |
|
| 2 | [pron] have been a difficult [noun sg] | 14 |
|
| 3 | it have been a difficult [noun sg] | 14 |
|
| 4 | it have been a difficult [noun sg] | 14 |
|
| 5 | [vb mod] have been a difficult [noun sg] | 5 |
|
| 6 | [modal v] have been a difficult [noun sg] | 5 |
|
| 7 | have been a [adv] difficult [noun sg] | 10 |
|
| 8 | have been a [adv] difficult [noun sg] | 10 |
|
| 9 | have been a very difficult [noun sg] | 5 |
|
| 10 | have been a very difficult [noun sg] | 5 |
|
| 11 | have been a difficult [noun sg] [prep] | 8 |
|
| 12 | have been a difficult [noun sg] [prep] | 8 |
|
| 13 | have been a difficult [noun sg] for | 7 |
|
| 14 | have been a difficult [noun sg] for | 7 |
|
