| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it is difficult | 483 |
|
| 2 | because it is [adj] | 438 |
|
| 3 | because it is [adj] | 367 |
|
| 4 | because it [be] difficult | 28 |
|
| 5 | because it be difficult | 28 |
|
| 6 | because it [is] difficult | 22 |
|
| 7 | because it is difficult | 20 |
|
| 8 | because [pron] is difficult | 20 |
|
| 9 | because it is difficult | 20 |
|
| 10 | because [pers pn] is difficult | 20 |
|
