| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] it [adj] | 1813 |
|
| 2 | [verb] it difficult | 1488 |
|
| 3 | [v-ing] it [adj] | 1067 |
|
| 4 | [v-ing] [pron] difficult | 172 |
|
| 5 | [v-ing] it difficult | 164 |
|
