| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [prep] [adj] years [unc] | 61 |
|
| 2 | be [prep] [num] years [unc] | 60 |
|
| 3 | be [prep] four [noun] [unc] | 20 |
|
| 4 | be [prep] four [noun pl] [unc] | 20 |
|
| 5 | [be] [prep] four years [unc] | 18 |
|
| 6 | be [prep] four years [unc] | 18 |
|
| 7 | be [prep] four years [unc] | 18 |
|
| 8 | be [prep] four year [unc] | 18 |
|
