| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] it is [prep] [noun] | 51 |
|
| 2 | difficult it be [prep] [noun] | 15 |
|
| 3 | difficult it [be] [prep] [noun] | 15 |
|
| 4 | difficult it is [prep] [noun] | 13 |
|
| 5 | difficult [pron] is [prep] [noun] | 13 |
|
| 6 | difficult [pers pn] is [prep] [noun] | 13 |
|
| 7 | difficult it [is] [prep] [noun] | 13 |
|
