| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] be [verb] [prep] years | 14 |
|
| 2 | [modal v] be [verb] [prep] years | 14 |
|
| 3 | [modal v] be [vb pp] [prep] years | 14 |
|
| 4 | [modal v] be [verb] for years | 8 |
|
| 5 | can be [verb] [prep] years | 6 |
|
| 6 | can be [verb] [prep] years | 6 |
|
