| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [adj] it [be] | 1963 |
|
| 2 | [adv] difficult [pron] [be] | 154 |
|
| 3 | [adv] difficult [pers pn] [be] | 151 |
|
| 4 | [adv] difficult it [be] | 147 |
|
