| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adj] to know [subord] | 23 |
|
| 2 | [pers pn] is [adj] to know [subord] | 23 |
|
| 3 | [pers pn] is [adj] to know whether | 21 |
|
| 4 | [pers pn] is difficult to know [subord] | 14 |
|
| 5 | [pers pn] is difficult to know [subord] | 14 |
|
| 6 | [pers pn] is impossible to know [subord] | 5 |
|
| 7 | [pers pn] is impossible to know [subord] | 5 |
|
