| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] not difficult [to-vb] | 155 |
|
| 2 | it [is] not difficult [verb] | 155 |
|
| 3 | it [is] not [adj] to see | 109 |
|
| 4 | it [is] [adv] difficult to see | 69 |
|
| 5 | it [be] not difficult to see | 44 |
|
| 6 | it [is] not difficult to see | 42 |
|
| 7 | it [is] [not/n't] difficult to see | 42 |
|
| 8 | [pron] [is] not difficult to see | 41 |
|
| 9 | it [is] not difficult see | 41 |
|
