| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | 1980s have been [art] | 13 |
|
| 2 | 1980s [verb] been [art] | 13 |
|
| 3 | 1980s [verb] been the | 9 |
|
| 4 | 1980s [vb base] been [art] | 7 |
|
| 5 | 1980s have been [art] | 7 |
|
| 6 | 1980s [vb -s] been [art] | 5 |
|
| 7 | 1980s has been [art] | 5 |
|
