| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] [adj] [verb] | 7394 |
|
| 2 | is [adv] [adj] [verb] | 6783 |
|
| 3 | be [adv] difficult [verb] | 1848 |
|
| 4 | [be] [adv] difficult [verb] | 1848 |
|
| 5 | [is] [adv] difficult [verb] | 1049 |
|
| 6 | is [adv] difficult [verb] | 994 |
|
| 7 | is [adv] difficult [verb] | 830 |
|
