| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it is [adv] difficult | 227 |
|
| 2 | although it is [adv] [adj] | 187 |
|
| 3 | although it is [adv] [adj] | 177 |
|
| 4 | although it be [adv] difficult | 9 |
|
| 5 | although it [be] [adv] difficult | 9 |
|
| 6 | although it [is] [adv] difficult | 8 |
|
| 7 | although [pron] is [adv] difficult | 6 |
|
| 8 | although it is [adv] difficult | 6 |
|
