| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] [to-vb] | 3033 |
|
| 2 | [adv] hard [to-vb] | 1376 |
|
| 3 | is hard [to-vb] | 997 |
|
| 4 | is [adv] hard | 423 |
|
