| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adj] for us | 134 |
|
| 2 | is [adj] for us | 127 |
|
| 3 | is difficult for [pron] | 64 |
|
| 4 | is difficult for [pers pn] | 55 |
|
| 5 | be difficult for us | 37 |
|
| 6 | [be] difficult for us | 37 |
|
| 7 | [is] difficult for us | 24 |
|
| 8 | is difficult [prep] us | 19 |
|
| 9 | is difficult for we | 19 |
|
| 10 | is difficult for us | 19 |
|
