| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | difficult [pers pn] [is] | 118 |
|
| 2 | difficult it [is] | 116 |
|
| 3 | difficult it [is] | 116 |
|
| 4 | difficult [pron] is | 116 |
|
| 5 | difficult [pron] 's | 5 |
|
