| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] be [adv] more | 239 |
|
| 2 | [prep] be [adv] difficult | 96 |
|
| 3 | be [adv] more difficult | 32 |
|
| 4 | [prep] be more difficult | 17 |
|
| 5 | [prep] [adv] more difficult | 5 |
|
