| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [was/were] for [pron] | 128 |
|
| 2 | it difficult for [pron] | 79 |
|
| 3 | it [was/were] difficult for | 55 |
|
| 4 | [was/were] difficult for [pron] | 31 |
|
