| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [vb pp] [prep] recent years | 80 |
|
| 2 | have been [vb pp] [prep] recent years | 80 |
|
| 3 | have been [vb pp] in recent years | 75 |
|
| 4 | have been [vb pp] in recent years | 75 |
|
| 5 | has been [vb pp] [prep] recent years | 45 |
|
| 6 | have been [vb pp] [prep] recent years | 32 |
|
| 7 | have been made [prep] recent years | 5 |
|
| 8 | have been developed [prep] recent years | 5 |
|
| 9 | have been [vb pp] over recent years | 5 |
|
| 10 | have been [vb pp] over recent years | 5 |
|
