| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but it is [adj] [prep] | 239 |
|
| 2 | but it is [adj] [prep] | 210 |
|
| 3 | [conj] it is difficult [prep] | 67 |
|
| 4 | [coord] it is difficult [prep] | 26 |
|
| 5 | but it be difficult [prep] | 16 |
|
| 6 | but it [be] difficult [prep] | 16 |
|
| 7 | but it [is] difficult [prep] | 11 |
|
| 8 | but it is difficult [prep] | 9 |
|
| 9 | but it is difficult [prep] | 9 |
|
| 10 | but [pers pn] is difficult [prep] | 9 |
|
| 11 | but [pron] is difficult [prep] | 9 |
|
| 12 | but it is difficult [prep] | 9 |
|
