| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] more [adj] [to-vb] | 323 |
|
| 2 | [was/were] [adv] difficult [to-vb] | 265 |
|
| 3 | [be] more difficult [to-vb] | 263 |
|
| 4 | [was/were] [adv] difficult [to-vb] | 212 |
|
| 5 | [was/were] more difficult [to-vb] | 24 |
|
| 6 | [was/were] more difficult [verb] | 24 |
|
