| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adj] for us | 93 |
|
| 2 | it is difficult for [pron] | 57 |
|
| 3 | it is difficult for [pers pn] | 49 |
|
| 4 | it [is] difficult for us | 19 |
|
| 5 | it [be] difficult for us | 19 |
|
| 6 | it be difficult for us | 19 |
|
| 7 | [pron] is difficult for us | 16 |
|
| 8 | it is difficult [prep] us | 16 |
|
| 9 | it is difficult for we | 16 |
|
| 10 | it is difficult [prep] us | 16 |
|
| 11 | it is difficult for us | 16 |
|
