| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adj] for [pers pn] | 640 |
|
| 2 | [be] difficult for [pers pn] | 162 |
|
| 3 | be difficult for [pers pn] | 162 |
|
| 4 | [is] difficult for [pers pn] | 77 |
|
| 5 | is difficult for [pron] | 64 |
|
| 6 | is difficult [prep] [pers pn] | 55 |
|
