| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] is difficult [prep] [pron] [to-vb] | 41 |
|
| 2 | [pron] is difficult [prep] [pron] [to-vb] | 41 |
|
| 3 | it is difficult [prep] [pron] [to-vb] | 41 |
|
| 4 | it is difficult [prep] [pron] [to-vb] | 41 |
|
| 5 | is [adv] difficult [prep] [pron] [to-vb] | 13 |
|
| 6 | is [adv] difficult [prep] [pron] [to-vb] | 13 |
|
| 7 | is very difficult [prep] [pron] [to-vb] | 8 |
|
| 8 | is very difficult [prep] [pron] [to-vb] | 8 |
|
| 9 | is difficult [prep] [pron] [to-vb] [prep] | 10 |
|
| 10 | is difficult [prep] [pron] [to-vb] [prep] | 10 |
|
| 11 | is difficult [prep] [pron] [to-vb] [art] | 6 |
|
| 12 | is difficult [prep] [pron] [to-vb] [adj] | 6 |
|
| 13 | is difficult [prep] [pron] [to-vb] [art] | 6 |
|
| 14 | is difficult [prep] [pron] [to-vb] [pron] | 6 |
|
| 15 | is difficult [prep] [pron] [to-vb] [conj] | 5 |
|
