| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is difficult [to-vb] such [art] | 5 |
|
| 2 | it is difficult [to-vb] such [art] | 5 |
|
| 3 | [pron] is difficult [to-vb] such [art] | 5 |
|
| 4 | [pers pn] is difficult [to-vb] such [art] | 5 |
|
| 5 | is difficult [to-vb] how such [art] | 5 |
|
| 6 | is difficult [to-vb] [Wh adv] such [art] | 5 |
|
| 7 | is difficult [to-vb] [adv] such [art] | 5 |
|
| 8 | is difficult [to-vb] how such [art] | 5 |
|
| 9 | is difficult [to-vb] such [art] [noun sg] | 5 |
|
| 10 | is difficult [to-vb] such [art] [noun] | 5 |
|
