| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] been [v-ing] on | 154 |
|
| 2 | have been [v-ing] on | 92 |
|
| 3 | [vb base] been working on | 68 |
|
| 4 | 've been [v-ing] on | 62 |
|
| 5 | [vb base] been concentrating on | 13 |
|
| 6 | [vb base] been living on | 9 |
|
| 7 | [vb base] been going on | 6 |
|
