| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have [been] [vb pp] | 5959 |
|
| 2 | [modal v] have [vb pp] a | 2808 |
|
| 3 | [modal v] have [been] a | 2005 |
|
| 4 | have [been] [vb pp] a | 1230 |
|
