| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [adj] it is | 1017 |
|
| 2 | [adv] difficult it be | 147 |
|
| 3 | [adv] difficult it [be] | 147 |
|
| 4 | [adv] difficult [pron] is | 109 |
|
| 5 | [adv] difficult it [is] | 106 |
|
