| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [vb pp] for a long time | 29 |
|
| 2 | be [vb pp] for a long time | 17 |
|
| 3 | be known for a long time | 8 |
|
| 4 | be kept for a long time | 5 |
|
