| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it was necessary for the | 24 |
|
| 2 | it was possible for the | 17 |
|
| 3 | it was impossible for the | 16 |
|
| 4 | it was difficult for the | 9 |
|
| 5 | it was usual for the | 7 |
|
| 6 | it was important for the | 7 |
|
| 7 | it was good for the | 6 |
|
| 8 | it was essential for the | 5 |
|
| 9 | it was natural for the | 5 |
|
| 10 | it was rare for the | 5 |
|
