| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [adj] for | 336 |
|
| 2 | have been difficult for | 25 |
|
| 3 | [verb] been difficult for | 25 |
|
| 4 | have been difficult [prep] | 23 |
|
| 5 | have been difficult [prep] | 23 |
|
| 6 | [vb infin] been difficult for | 21 |
|
| 7 | have [be] difficult for | 21 |
|
| 8 | have [been] difficult for | 21 |
|
| 9 | have been difficult for | 21 |
|
| 10 | have be difficult for | 21 |
|
