| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [adv] difficult [verb] | 1078 |
|
| 2 | it be [adv] difficult [verb] | 875 |
|
| 3 | it be sometimes [adj] [verb] | 127 |
|
| 4 | [pron] be sometimes difficult [verb] | 32 |
|
| 5 | [pers pn] be sometimes difficult [verb] | 31 |
|
| 6 | it be sometimes difficult [verb] | 30 |
|
| 7 | it be sometimes difficult [verb] | 30 |
|
| 8 | it [be] sometimes difficult [verb] | 30 |
|
