| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] it is [to-vb] | 292 |
|
| 2 | difficult it [be] [to-vb] | 85 |
|
| 3 | difficult it be [to-vb] | 85 |
|
| 4 | difficult it is [verb] | 69 |
|
| 5 | difficult [pers pn] is [to-vb] | 63 |
|
| 6 | difficult [pron] is [to-vb] | 63 |
|
| 7 | difficult it is [to-vb] | 63 |
|
| 8 | difficult it [is] [to-vb] | 63 |
|
