| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have been [vb pp] [adj] | 166 |
|
| 2 | have been [vb pp] [adj] years | 71 |
|
| 3 | [modal v] have [vb pp] [adj] years | 33 |
|
| 4 | [modal v] have been [adj] years | 30 |
|
| 5 | [modal v] have been [vb pp] years | 6 |
|
