| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] [been] [prep] [det] | 233 |
|
| 2 | [vb base] [prep] [det] year | 80 |
|
| 3 | [been] [prep] [det] year | 41 |
|
| 4 | [vb base] [been] [prep] year | 10 |
|
