| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it 's [adv] [adv] difficult [conj] | 9 |
|
| 2 | it 's not [adv] difficult [conj] | 5 |
|
| 3 | it 's [not/n't] [adv] difficult [conj] | 5 |
|
| 4 | it 's not [adv] difficult [conj] | 5 |
|
| 5 | it 's [adv] difficult [to-vb] [conj] | 11 |
|
| 6 | it 's [adv] difficult [verb] [conj] | 11 |
|
| 7 | it 's [adv] difficult [conj] [pron] | 5 |
|
