| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] it a difficult | 7 |
|
| 2 | it be a difficult | 127 |
|
| 3 | it [be] a difficult | 127 |
|
| 4 | it [is] a difficult | 81 |
|
| 5 | it [was/were] a difficult | 46 |
|
| 6 | it was a difficult | 46 |
|
| 7 | it 's a difficult | 45 |
|
| 8 | it is a difficult | 36 |
|
| 9 | it a [adv] difficult | 7 |
|
| 10 | it a [adv] difficult | 7 |
|
| 11 | it a difficult [noun sg] | 6 |
|
| 12 | it a difficult [noun] | 6 |
|
