| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] more difficult [to-vb] | 263 |
|
| 2 | be more difficult [to-vb] | 263 |
|
| 3 | were more [adj] [to-vb] | 211 |
|
| 4 | were [adv] difficult [to-vb] | 41 |
|
| 5 | were [adv] difficult [to-vb] | 37 |
|
| 6 | [was/were] more difficult [to-vb] | 24 |
|
| 7 | were more difficult [to-vb] | 10 |
|
| 8 | were more difficult [verb] | 10 |
|
