| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] for [adj] [noun pl] | 85 |
|
| 2 | it [be] difficult for [adj] | 30 |
|
| 3 | it [be] difficult for [noun pl] | 28 |
|
| 4 | [be] difficult for [adj] [noun pl] | 20 |
|
| 5 | it difficult for [adj] [noun pl] | 16 |
|
