| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] so difficult [to-vb] | 66 |
|
| 2 | be so difficult [to-vb] | 66 |
|
| 3 | [is] so difficult [to-vb] | 32 |
|
| 4 | [pron] so difficult [to-vb] | 22 |
|
| 5 | [pers pn] so difficult [to-vb] | 21 |
|
| 6 | it so difficult [to-vb] | 20 |
|
| 7 | is so difficult [to-vb] | 20 |
|
| 8 | it so difficult [to-vb] | 20 |
|
| 9 | [was/were] so difficult [to-vb] | 13 |
|
| 10 | was so difficult [to-vb] | 12 |
|
| 11 | 's so difficult [to-vb] | 12 |
|
| 12 | [adv] so difficult [to-vb] | 12 |
|
| 13 | [verb] so difficult [to-vb] | 11 |
|
| 14 | are so difficult [to-vb] | 10 |
|
| 15 | [am/are] so difficult [to-vb] | 10 |
|
| 16 | [be] so difficult [to-vb] | 9 |
|
| 17 | be so difficult [to-vb] | 9 |
|
| 18 | prove so difficult [to-vb] | 8 |
|
| 19 | [adv] so difficult [to-vb] | 7 |
|
| 20 | [noun] so difficult [to-vb] | 6 |
|
| 21 | [not/n't] so difficult [to-vb] | 5 |
|
| 22 | [noun pl] so difficult [to-vb] | 5 |
|
| 23 | [coord] so difficult [to-vb] | 5 |
|
| 24 | not so difficult [to-vb] | 5 |
|
| 25 | [vb past] so difficult [to-vb] | 5 |
|
| 26 | not so difficult [to-vb] | 5 |
|
| 27 | [conj] so difficult [to-vb] | 5 |
|
| 28 | so difficult [to-vb] [prep] | 23 |
|
| 29 | so difficult [to-vb] [prep] | 23 |
|
| 30 | so difficult [to-vb] [art] | 16 |
|
