| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [is] difficult [to-vb] [adv] | 393 |
|
| 2 | [pers pn] [is] difficult [to-vb] [adv] | 390 |
|
| 3 | it [is] difficult [to-vb] [adv] | 389 |
|
| 4 | it [is] difficult [to-vb] [adv] | 389 |
|
| 5 | [noun] [is] difficult [to-vb] [adv] | 18 |
|
| 6 | [noun sg] [is] difficult [to-vb] [adv] | 14 |
|
| 7 | [is] [adv] difficult [to-vb] [adv] | 164 |
|
| 8 | [is] [adv] difficult [to-vb] [adv] | 123 |
|
| 9 | [is] very difficult [to-vb] [adv] | 47 |
|
| 10 | [is] very difficult [to-vb] [adv] | 47 |
|
| 11 | [is] not difficult [to-vb] [adv] | 41 |
|
| 12 | [is] [not/n't] difficult [to-vb] [adv] | 41 |
|
| 13 | [is] not difficult [to-vb] [adv] | 36 |
|
| 14 | [is] extremely difficult [to-vb] [adv] | 9 |
|
| 15 | [is] extremely difficult [to-vb] [adv] | 9 |
|
| 16 | [is] often difficult [to-vb] [adv] | 8 |
|
| 17 | [is] often difficult [to-vb] [adv] | 8 |
|
| 18 | [is] more difficult [to-vb] [adv] | 7 |
|
| 19 | [is] quite difficult [to-vb] [adv] | 7 |
|
| 20 | [is] quite difficult [to-vb] [adv] | 7 |
|
| 21 | [is] more difficult [to-vb] [adv] | 7 |
|
| 22 | [is] n't difficult [to-vb] [adv] | 5 |
|
| 23 | [is] sometimes difficult [to-vb] [adv] | 5 |
|
| 24 | [is] sometimes difficult [to-vb] [adv] | 5 |
|
| 25 | [is] difficult [adv] [to-vb] [adv] | 5 |
|
| 26 | [is] difficult [adv] [to-vb] [adv] | 5 |
|
| 27 | [is] difficult [to-vb] [adv] [adv] | 43 |
|
| 28 | [is] difficult [to-vb] [pron] [adv] | 29 |
|
| 29 | [is] difficult [to-vb] [adv] [adv] | 19 |
|
| 30 | [is] difficult [to-vb] [pers pn] [adv] | 16 |
|
