| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have [been] [verb] [prep] [noun] | 697 |
|
| 2 | [modal v] [verb] [been] [verb] [prep] year | 6 |
|
| 3 | [modal v] have [been] [verb] [prep] year | 6 |
|
| 4 | [modal v] have [be] [verb] [prep] year | 6 |
|
