| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [v-ing] at | 90 |
|
| 2 | [vb base] been looking at | 79 |
|
| 3 | 've been [v-ing] at | 69 |
|
| 4 | [vb base] been working at | 12 |
|
