| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [been] [noun] | 684 |
|
| 2 | have [been] discussion | 14 |
|
| 3 | [verb] [been] discussion | 14 |
|
| 4 | [vb -s] [been] discussion | 9 |
|
| 5 | has [be] discussion | 8 |
|
