| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] [to-vb] a | 4291 |
|
| 2 | [vb base] [been] a | 671 |
|
| 3 | [vb base] [to-vb] [been] | 569 |
|
| 4 | [to-vb] [been] a | 404 |
|
