| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is difficult [not/n't] [verb] | 28 |
|
| 2 | it is [adj] [not/n't] see | 11 |
|
| 3 | it is difficult [adv] see | 10 |
|
| 4 | it [is] difficult [not/n't] see | 9 |
|
| 5 | it [be] difficult [not/n't] see | 9 |
|
| 6 | it be difficult [not/n't] see | 9 |
|
| 7 | [pron] is difficult [not/n't] see | 8 |
|
| 8 | [pers pn] is difficult [not/n't] see | 8 |
|
| 9 | it is difficult [not/n't] see | 8 |
|
