| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it can be [adv] difficult | 46 |
|
| 2 | it [modal v] be more difficult | 33 |
|
| 3 | it can be more [adj] | 21 |
|
| 4 | it can be more [adj] | 21 |
|
| 5 | [pron] can be more difficult | 8 |
|
| 6 | it can be more difficult | 7 |
|
| 7 | it can be more difficult | 7 |
|
| 8 | it can [be] more difficult | 7 |
|
| 9 | it can [be] more difficult | 7 |
|
