| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but it is [adv] [adv] difficult | 13 |
|
| 2 | but it is [adv] [adv] difficult | 10 |
|
| 3 | but it is [adv] [adv] difficult | 10 |
|
| 4 | but it is [adv] [adv] difficult | 10 |
|
| 5 | but it is [adv] more difficult | 7 |
|
| 6 | but it is [adv] more difficult | 7 |
|
| 7 | but it is [adv] difficult [to-vb] | 27 |
|
| 8 | but it is [adv] difficult [verb] | 27 |
|
