| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is difficult [prep] [pron] [to-vb] | 43 |
|
| 2 | is difficult for [pron] [to-vb] | 43 |
|
| 3 | is difficult [prep] [pron] [to-vb] | 43 |
|
| 4 | is difficult for [pron] [to-vb] | 43 |
|
| 5 | is difficult [prep] [pers pn] [to-vb] | 41 |
|
| 6 | is difficult [prep] we [to-vb] | 13 |
|
| 7 | is difficult [prep] us [to-vb] | 13 |
|
| 8 | is difficult [prep] them [to-vb] | 12 |
|
| 9 | is difficult [prep] they [to-vb] | 12 |
|
| 10 | is difficult [prep] me [to-vb] | 6 |
|
| 11 | is difficult [prep] i [to-vb] | 6 |
|
