| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] is [adv] difficult [to-vb] [coord] | 19 |
|
| 2 | [noun sg] is [adv] difficult [verb] [coord] | 15 |
|
| 3 | [noun] is [adv] difficult [verb] and | 12 |
|
| 4 | [noun] is [adv] difficult [verb] but | 5 |
|
