| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [noun] [to-vb] | 29 |
|
| 2 | [vb base] been [noun pl] [to-vb] | 28 |
|
| 3 | [vb base] been attempts [to-vb] | 21 |
|
| 4 | [vb base] been attempt [to-vb] | 21 |
|
