| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | in recent years have [be] | 8 |
|
| 2 | in recent years [vb base] [be] | 8 |
|
| 3 | in recent years [vb base] [been] | 8 |
|
| 4 | in recent years [vb base] be | 8 |
|
| 5 | in recent years [vb base] been | 8 |
|
