| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [vb pp] four | 153 |
|
| 2 | [be] four years | 75 |
|
| 3 | [vb pp] four years | 58 |
|
| 4 | [be] [vb pp] years | 23 |
|
