| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [is] [not/n't] [adv] difficult [to-vb] | 25 |
|
| 2 | it [is] [not/n't] [adv] difficult [to-vb] | 24 |
|
| 3 | [pers pn] [is] [not/n't] [adv] difficult [to-vb] | 24 |
|
| 4 | it [is] [not/n't] [adv] difficult [to-vb] | 24 |
|
| 5 | [noun] [is] [not/n't] [adv] difficult [to-vb] | 5 |
|
| 6 | [is] [adv] [not/n't] [adv] difficult [to-vb] | 6 |
|
| 7 | [is] [adv] [not/n't] [adv] difficult [to-vb] | 6 |
|
| 8 | [is] [not/n't] [adv] difficult [to-vb] [conj] | 7 |
|
| 9 | [is] [not/n't] [adv] difficult [to-vb] [prep] | 5 |
|
| 10 | [is] [not/n't] [adv] difficult [to-vb] [prep] | 5 |
|
| 11 | [is] [not/n't] [adv] difficult [to-vb] [art] | 5 |
|
| 12 | [is] [not/n't] [adv] difficult [to-vb] [art] | 5 |
|
