| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but it is [adv] [adj] | 749 |
|
| 2 | [conj] it is [adv] difficult | 203 |
|
| 3 | [coord] it is [adv] difficult | 82 |
|
| 4 | but it be [adv] difficult | 72 |
|
| 5 | but it [be] [adv] difficult | 72 |
|
| 6 | but it [is] [adv] difficult | 56 |
|
| 7 | but it is [adv] difficult | 42 |
|
| 8 | but [pron] is [adv] difficult | 36 |
|
| 9 | but it is [adv] difficult | 35 |
|
