| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] [adv] difficult [verb] | 919 |
|
| 2 | it [is] [adv] difficult [verb] | 757 |
|
| 3 | it [is] sometimes [adj] [verb] | 113 |
|
| 4 | it [is] sometimes [adj] [verb] | 100 |
|
| 5 | it [be] sometimes difficult [verb] | 30 |
|
| 6 | [pron] [is] sometimes difficult [verb] | 25 |
|
| 7 | it [is] sometimes difficult [verb] | 24 |
|
| 8 | it [is] sometimes difficult [verb] | 24 |
|
| 9 | it [is] sometimes difficult [verb] | 24 |
|
| 10 | [pers pn] [is] sometimes difficult [verb] | 24 |
|
