| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [verb] that [det] | 652 |
|
| 2 | is difficult [verb] [det] | 117 |
|
| 3 | is difficult [verb] that | 97 |
|
| 4 | difficult [verb] that [det] | 35 |
|
