| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which is [adv] [verb] | 2096 |
|
| 2 | is [adv] difficult [verb] | 994 |
|
| 3 | which is [adv] difficult | 33 |
|
| 4 | which is difficult [verb] | 19 |
|
