| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] [vb infin] be [adj] years | 12 |
|
| 2 | it [vb mod] [verb] been [adj] years | 12 |
|
| 3 | it [vb mod] have be [adj] years | 12 |
|
| 4 | it [vb mod] [verb] be [num] years | 10 |
|
| 5 | it [vb mod] have be [adj] years | 10 |
|
