| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been doing for | 37 |
|
| 2 | [vb base] been doing for | 22 |
|
| 3 | have been doing for | 13 |
|
| 4 | [vb past] been doing for | 11 |
|
| 5 | 've been doing for | 9 |
|
| 6 | had been doing for | 8 |
|
