| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb -s] [pers pn] [adv] difficult | 10 |
|
| 2 | it [vb -s] [pers pn] [adv] difficult | 10 |
|
| 3 | it [vb -s] [pers pn] very difficult | 6 |
|
| 4 | it [vb -s] [pers pn] very difficult | 6 |
|
