| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] [adv] difficult [verb] whether | 25 |
|
| 2 | it [be] [adv] difficult [verb] whether | 25 |
|
| 3 | it [be] often difficult [verb] [subord] | 6 |
|
| 4 | it [be] often difficult [verb] [conj] | 6 |
|
| 5 | it [be] often difficult [verb] whether | 5 |
|
| 6 | it [be] often difficult [verb] whether | 5 |
|
| 7 | it [be] often [adj] [verb] whether | 5 |
|
| 8 | [pron] [be] often difficult [verb] whether | 5 |
|
| 9 | it [be] often difficult [verb] whether | 5 |
|
| 10 | it [be] often difficult [verb] whether | 5 |
|
| 11 | it [be] often [adj] [verb] whether | 5 |
|
| 12 | [pers pn] [be] often difficult [verb] whether | 5 |
|
