| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] it 's [adv] | 1969 |
|
| 2 | [verb] it [adv] difficult | 637 |
|
| 3 | it 's [adv] difficult | 381 |
|
| 4 | [verb] it 's difficult | 44 |
|
