| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] is difficult [to-vb] [adv] | 323 |
|
| 2 | [pers pn] is difficult [to-vb] [adv] | 320 |
|
| 3 | it is difficult [to-vb] [adv] | 319 |
|
| 4 | it is difficult [to-vb] [adv] | 319 |
|
| 5 | [noun] is difficult [to-vb] [adv] | 18 |
|
| 6 | [noun sg] is difficult [to-vb] [adv] | 14 |
|
| 7 | is [adv] difficult [to-vb] [adv] | 121 |
|
| 8 | is [adv] difficult [to-vb] [adv] | 84 |
|
| 9 | is not difficult [to-vb] [adv] | 37 |
|
| 10 | is [not/n't] difficult [to-vb] [adv] | 37 |
|
| 11 | is not difficult [to-vb] [adv] | 32 |
|
| 12 | is very difficult [to-vb] [adv] | 29 |
|
| 13 | is very difficult [to-vb] [adv] | 29 |
|
| 14 | is often difficult [to-vb] [adv] | 7 |
|
| 15 | is extremely difficult [to-vb] [adv] | 7 |
|
| 16 | is extremely difficult [to-vb] [adv] | 7 |
|
| 17 | is often difficult [to-vb] [adv] | 7 |
|
| 18 | is more difficult [to-vb] [adv] | 5 |
|
| 19 | is more difficult [to-vb] [adv] | 5 |
|
| 20 | is n't difficult [to-vb] [adv] | 5 |
|
| 21 | is difficult [adv] [to-vb] [adv] | 5 |
|
| 22 | is difficult [adv] [to-vb] [adv] | 5 |
|
| 23 | is difficult [to-vb] [adv] [adv] | 27 |
|
| 24 | is difficult [to-vb] [pron] [adv] | 23 |
|
| 25 | is difficult [to-vb] [Wh adv] [adv] | 14 |
|
| 26 | is difficult [to-vb] [pers pn] [adv] | 13 |
|
| 27 | is difficult [to-vb] how [adv] | 12 |
|
| 28 | is difficult [to-vb] [adv] [adv] | 12 |
|
| 29 | is difficult [to-vb] how [adv] | 12 |
|
| 30 | is difficult [to-vb] [noun] [adv] | 9 |
|
