| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] [adj] | 62957 |
|
| 2 | is [adv] [adj] | 53859 |
|
| 3 | be [adv] difficult | 3351 |
|
| 4 | [be] [adv] difficult | 3351 |
|
| 5 | [is] [adv] difficult | 1791 |
|
| 6 | is [adv] difficult | 1587 |
|
| 7 | is [adv] difficult | 1363 |
|
