| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] is [adv] difficult [verb] | 586 |
|
| 2 | which [pron] is [adv] [verb] | 117 |
|
| 3 | which [pron] is difficult [verb] | 21 |
|
| 4 | which is [adv] difficult [verb] | 19 |
|
| 5 | which [pron] is [adv] difficult | 12 |
|
