| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [been] [adv] [adj] for | 73 |
|
| 2 | has [been] [adv] [adj] for | 71 |
|
| 3 | have [been] [adv] difficult for | 17 |
|
| 4 | [verb] [been] [adv] difficult for | 17 |
|
| 5 | [vb -s] [been] [adv] difficult for | 11 |
|
| 6 | has [been] [adv] difficult [prep] | 7 |
|
| 7 | has [be] [adv] difficult for | 6 |
|
| 8 | has [been] [adv] difficult for | 6 |
|
