| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] for a long time | 24 |
|
| 2 | [been] for a long time | 22 |
|
| 3 | [vb base] [been] for a long | 8 |
|
| 4 | [vb base] [been] a long time | 6 |
|
