| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] [been] [v-ing] [to-vb] | 389 |
|
| 2 | [vb base] [been] [v-ing] hard | 25 |
|
| 3 | [been] [v-ing] hard [to-vb] | 10 |
|
