| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] [vb pp] [prep] three year | 18 |
|
| 2 | [verb] [been] [vb pp] [prep] three year | 18 |
|
| 3 | [vb -s] [been] [vb pp] [prep] three year | 11 |
|
| 4 | has [been] [vb pp] [prep] three year | 11 |
|
| 5 | had [been] [vb pp] [prep] three year | 5 |
|
| 6 | [vb past] [been] [vb pp] [prep] three year | 5 |
|
| 7 | [been] [vb pp] [prep] three year [prep] | 7 |
|
| 8 | [been] [vb pp] [prep] three year [prep] | 7 |
|
