| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | difficult believe that [adj] | 20 |
|
| 2 | difficult to believe [that] [adj] | 20 |
|
| 3 | difficult believe [that] [det] | 15 |
|
| 4 | difficult believe [that] this | 6 |
|
| 5 | difficult believe [that] this | 6 |
|
