| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] because it [is] [adj] [verb] | 21 |
|
| 2 | [adv] [conj] it [is] difficult [verb] | 20 |
|
| 3 | [adv] because it [be] difficult [verb] | 8 |
|
| 4 | [adv] [subord] it [is] difficult [verb] | 8 |
|
| 5 | [adv] because it [is] difficult [verb] | 6 |
|
| 6 | [adv] because [pron] [is] difficult [verb] | 6 |
|
| 7 | [adv] because it [is] difficult [verb] | 6 |
|
| 8 | [adv] because it [is] difficult [verb] | 6 |
|
| 9 | [adv] because [pers pn] [is] difficult [verb] | 6 |
|
