| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is difficult [to-vb] [conj] [det] | 29 |
|
| 2 | is difficult [verb] [conj] this | 17 |
|
| 3 | is difficult [verb] that [det] | 14 |
|
| 4 | is difficult [verb] [that] [det] | 14 |
|
| 5 | is difficult [verb] that [det] | 14 |
|
| 6 | is difficult [verb] [subord] [det] | 13 |
|
| 7 | is difficult [verb] whether [det] | 9 |
|
| 8 | is difficult [verb] whether [det] | 9 |
|
| 9 | is difficult to believe [conj] [det] | 6 |
|
| 10 | is difficult believe [conj] [det] | 6 |
|
