| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [adv] difficult [verb] | 875 |
|
| 2 | because it be [adv] [verb] | 151 |
|
| 3 | because it be [adv] difficult | 25 |
|
| 4 | because it be difficult [verb] | 21 |
|
