| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] been known for [adj] years | 16 |
|
| 2 | have been known for [adj] years | 16 |
|
| 3 | [vb base] been known for [adj] years | 7 |
|
| 4 | have been known for [adj] years | 7 |
|
| 5 | [vb -s] been known for [adj] years | 6 |
|
| 6 | has been known for [adj] years | 6 |
|
| 7 | been known for [adj] years [conj] | 5 |
|
