| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [not/n't] difficult [verb] [that] | 22 |
|
| 2 | [be] [not/n't] difficult [verb] [that] | 22 |
|
| 3 | [is] [not/n't] difficult [verb] [that] | 16 |
|
| 4 | is [not/n't] difficult [verb] [that] | 15 |
|
| 5 | [was/were] [not/n't] difficult [verb] [that] | 6 |
|
| 6 | was [not/n't] difficult [verb] [that] | 6 |
|
| 7 | [not/n't] difficult [verb] [that] [pron] | 6 |
|
| 8 | [not/n't] difficult [verb] [that] [art] | 5 |
|
| 9 | [not/n't] difficult [verb] [that] [art] | 5 |
|
