| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] difficult [conj] | 18 |
|
| 2 | it [is] [adv] difficult [subord] | 17 |
|
| 3 | it [is] [adv] difficult [coord] | 14 |
|
| 4 | it [is] [adv] difficult and | 13 |
|
| 5 | it [is] [adv] difficult and | 13 |
|
| 6 | it 's [adv] difficult [conj] | 13 |
|
| 7 | it [is] very difficult [conj] | 10 |
|
| 8 | it [is] more difficult [conj] | 6 |
|
