| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] difficult [verb] that | 30 |
|
| 2 | is [adv] difficult [to-vb] that | 30 |
|
| 3 | is [not/n't] difficult [verb] that | 15 |
|
| 4 | is not difficult [verb] that | 15 |
|
| 5 | is [adv] difficult [verb] that | 15 |
|
| 6 | is not difficult [verb] that | 15 |
|
| 7 | is [adv] difficult see that | 7 |
|
| 8 | is [adv] difficult to see that | 7 |
|
| 9 | is [adv] difficult to imagine that | 5 |
|
| 10 | is [adv] difficult imagine that | 5 |
|
