| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it is difficult [verb] | 377 |
|
| 2 | although it is [adj] [verb] | 138 |
|
| 3 | although it is [adj] [verb] | 135 |
|
| 4 | [subord] it is difficult [verb] | 120 |
|
| 5 | although it [be] difficult [verb] | 36 |
|
| 6 | although it be difficult [verb] | 36 |
|
| 7 | although it [is] difficult [verb] | 31 |
|
| 8 | although [pron] is difficult [verb] | 30 |
|
| 9 | although it is difficult [verb] | 30 |
|
| 10 | although it is difficult [verb] | 30 |
|
| 11 | although [pers pn] is difficult [verb] | 30 |
|
| 12 | although it is difficult [verb] | 30 |
|
