| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] have been a [noun sg] | 2308 |
|
| 2 | have been a difficult [noun sg] | 24 |
|
| 3 | [pron] have been a difficult | 17 |
|
| 4 | [pron] have a difficult [noun sg] | 15 |
|
