| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] [adv] difficult [verb] | 919 |
|
| 2 | it [is] [adv] difficult [verb] | 757 |
|
| 3 | it [is] also [adj] [verb] | 549 |
|
| 4 | it [be] also difficult [verb] | 19 |
|
| 5 | [pron] [is] also difficult [verb] | 17 |
|
| 6 | it [is] also difficult [verb] | 17 |
|
