| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] difficult [verb] [adv] | 423 |
|
| 2 | [is] [adj] see [adv] | 391 |
|
| 3 | [is] [adj] see [adv] | 385 |
|
| 4 | [be] difficult see [adv] | 144 |
|
| 5 | [is] difficult see [adv] | 128 |
|
