| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adj] to say [Wh adv] [adj] | 13 |
|
| 2 | is [adj] to say how [adj] | 12 |
|
| 3 | is [adj] to say [Wh adv] [det] | 10 |
|
| 4 | is impossible to say [Wh adv] [adj] | 5 |
|
| 5 | is difficult to say [Wh adv] [adj] | 5 |
|
| 6 | is difficult to say [Wh adv] [adj] | 5 |
|
| 7 | is impossible to say [Wh adv] [adj] | 5 |
|
