| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] it difficult for [pron] [to-vb] | 26 |
|
| 2 | made it difficult for [pron] [to-vb] | 25 |
|
| 3 | [vb past] it difficult for [pers pn] [to-vb] | 25 |
|
| 4 | [vb past] it difficult for they [to-vb] | 10 |
|
| 5 | [vb past] it difficult for them [to-vb] | 10 |
|
| 6 | [vb past] it difficult for him [to-vb] | 7 |
|
| 7 | [vb past] it difficult for he [to-vb] | 7 |
|
