| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it difficult for [pron] [to-vb] | 65 |
|
| 2 | it [was/were] difficult for [pron] | 22 |
|
| 3 | it [was/were] for [pron] [to-vb] | 21 |
|
| 4 | [was/were] difficult for [pron] [to-vb] | 20 |
|
