| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is difficult [to-vb] [noun] | 118 |
|
| 2 | it [is] difficult [to-vb] [noun sg] | 60 |
|
| 3 | it [is] difficult [to-vb] [noun pl] | 54 |
|
| 4 | it 's difficult [to-vb] [noun] | 24 |
|
| 5 | it [is] difficult [to-vb] [noun prp] | 14 |
|
| 6 | it [is] difficult [to-vb] [n mass] | 13 |
|
| 7 | it [is] difficult [to-vb] people | 12 |
|
| 8 | it [is] difficult [to-vb] people | 11 |
|
| 9 | it [is] difficult to find [noun] | 11 |
|
| 10 | it [is] difficult to get [noun] | 10 |
|
| 11 | it [is] difficult to make [noun] | 7 |
|
