| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] for [det] [noun] | 235 |
|
| 2 | it [be] difficult for [noun] | 47 |
|
| 3 | it [be] difficult for [det] | 16 |
|
| 4 | [be] difficult for [det] [noun] | 16 |
|
| 5 | it difficult for [det] [noun] | 5 |
|
