| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] difficult it [be] [prep] | 35 |
|
| 2 | how difficult it [be] [prep] | 31 |
|
| 3 | [Wh adv] difficult it [be] [prep] | 31 |
|
| 4 | how difficult it [be] [prep] | 31 |
|
| 5 | difficult [conj] it [be] [prep] | 5 |
|
| 6 | difficult it [modal v] [be] [prep] | 6 |
|
| 7 | difficult it [vb mod] [be] [prep] | 6 |
|
| 8 | difficult it [be] [verb] [prep] | 14 |
|
| 9 | difficult it [be] [to-vb] [prep] | 8 |
|
| 10 | difficult it [be] going [prep] | 5 |
|
| 11 | difficult it [be] [v-ing] [prep] | 5 |
|
| 12 | difficult it [be] go [prep] | 5 |
|
| 13 | difficult it [be] [prep] [noun] | 15 |
|
| 14 | difficult it [be] [prep] [pron] | 10 |
|
| 15 | difficult it [be] [prep] [pers pn] | 10 |
|
| 16 | difficult it [be] [prep] [noun pl] | 9 |
|
