| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it 's [verb] [prep] [be] [adj] | 175 |
|
| 2 | it 's [verb] [prep] [be] difficult | 21 |
|
| 3 | it [be] [verb] [prep] [be] difficult | 20 |
|
| 4 | it be [verb] [prep] [be] difficult | 20 |
|
| 5 | it [is] [verb] [prep] [be] difficult | 18 |
|
| 6 | [pers pn] 's [verb] [prep] [be] difficult | 17 |
|
| 7 | [pron] 's [verb] [prep] [be] difficult | 17 |
|
| 8 | it 's [verb] [prep] [be] difficult | 16 |
|
