| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [pron] is difficult [verb] | 53 |
|
| 2 | [adv] it is difficult [verb] | 53 |
|
| 3 | [adv] it is difficult [verb] | 53 |
|
| 4 | [adv] [pers pn] is difficult [verb] | 53 |
|
| 5 | [adv] [pron] is difficult [to-vb] | 52 |
|
| 6 | then [pron] is difficult [verb] | 8 |
|
| 7 | sometimes [pron] is difficult [verb] | 7 |
|
| 8 | yet [pron] is difficult [verb] | 5 |
|
