| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] [prep] [pron] | 1360 |
|
| 2 | it [is] difficult [prep] | 278 |
|
| 3 | [is] difficult [prep] [pron] | 91 |
|
| 4 | it difficult [prep] [pron] | 80 |
|
| 5 | it [is] difficult [pron] | 6 |
|
